How Common Is Sex among Siblings among Teenagers and Young Adults?

Sammy writes:

“Brothers and sisters fuck quite a bit, as teenagers…”

Really? Brothers and sisters who grew up together from day one in the same household? How do you know of this? I’ve heard of it happening between step brothers and sisters, but never heard of it happening between actual “blood” brothers and sisters who both share the same parents and grew up in the same household. Percentage-wise, how often would you say the latter happens (and what are you basing this on)?

Unfortunately a lot of this falls under the category of “child molestation,” but it usually isn’t. A lot of teenage boys have sex with their vulnerable younger sisters. With the sisters, it is often more or less consensual. Childhood sex play often involves brothers, sisters, cousins, and their friends. The age ranges of childhood sex play can range from six all the way up to 15 for both sexes, and it is possible that all ages can be involved at the same time. For instance, scenes, often with brothers, sisters and cousins, can occur with groups where the age ranges from 8 all the way up to 15 and can include both homosexual (often lesbian) and heterosexual conduct.

Not only do brothers and sisters have sexual experiences particularly in adolescence, but sisters have a lot more sex with each other than you could possibly imagine. Young teenage sisters around the ages of 13-15 who are just discovering the joys of masturbation (as almost all teenage girls are nowadays at a very early age, typically 13) have lesbian sex with each other, mutually masturbate each other, etc. I would say that maybe 5-10% of sisters in this age group engage in this activity. All of the cases I saw involved girls with a predominantly heterosexual orientation. So most sisters who are doing this are not lesbians. Instead they are straight or possibly bisexual.

I discovered a lot of this activity when looking through forums where younger teenage girls were discussing sexual issues such as onset of first pubic hair and sexarche, onset and frequency of masturbation, and some other sexual things. It is from these forums that I derive my 5-10% figure because ~5-10% of the girls on that forum admitted to having sex with their sisters. The age range for this sister-sister sex was 13-15.

Sources: I work as a counselor, and I hear stories of childhood sex play from clients constantly.

Teenage boys having sex with their younger sisters is extremely common as we can see from recent famous cases. It is typically brushed under the carpet, as it possibly ought to be.

Arrest in these circumstances is just wrong, and in California, other than rape, all sex between juveniles of all ages is legal. You simply cannot arrest two kids for doing consensual sexual things with each other. If there is a serious age discrepancy with a teenager (usually a boy and typically a brother) doing sexual things with a young child (usually a girl and typically a sister), the teenager must be told that this is unacceptable and must stop, and they should have to undergo counseling.

Generally this sort of thing is handled by Social Services, social workers and therapists in California and not law enforcement, which is how it ought to be. In extreme cases of teenage boys serially molesting young girls, they may be remanded to the juvenile justice system, but they may not be tried in the adult system. At any rate, clinically this behavior means little as according to the DSM, pedophilia cannot be diagnosed in people age 16 or younger.

There are videos on the Internet of brothers having sex with their sisters or at least of people claiming to be brothers having sex with sisters. I have no idea how old they were, but they appeared to be older teenagers. I felt that they were genuine.

To give you an example of how common this activity can be at least in certain circumstances, in Egypt, due to a housing crisis, young people are not able to move out of the parental home, so young adults of the same family are often living under the same roof. Not only that, but living conditions are so overcrowded that these late teens and  young adults are often sleeping in close quarters in living rooms, etc.

A recent article in the US press noted that there is an extremely high level of sexual activity among brothers and sisters occurring in urban Egypt in these circumstances. The brothers and sisters engaging in this activity were ~16-23. Egyptian society didn’t seem to be interested in doing anything about it. I assume that this behavior was either denied, brushed under the carpet or dealt with in the family, probably by silence and willful ignorance. Law enforcement was not getting involved.


Filed under California, Egypt, Gender Studies, Heterosexuality, Incest, Law, North Africa, Regional, Sex, USA, West

11 responses to “How Common Is Sex among Siblings among Teenagers and Young Adults?

  1. Jason Y

    I couldn’t even stand the thought of my adult family naked, much less having sex with them. So much for my adult family going to a nudist camp. Note, most of my family are “stereotypically, as society would falsely say”, beautiful looking. Nobody is fat etc..

  2. Vid

    This is pure sick. I dont think it is that common esp in close-knit families. Usually this kind of behaviour is observed when there are a lot of family issues like divorce, domestic violence, rape etc are going on. In muslims I dont know, but in many religions this is completely prohibited and it is parents fault if something like this is ever caught.

  3. Marilyn

    I think it occurs more often in families where the children are not properly socialized outside the family, and within the larger extended family, and not educated in a spiritual faith to make them aware that this is not acceptable behavior. Exploration of your own body is not prohibited, but a mutual sexual experience between siblings is not healthy for them emotionally, aside from the immorality of it. Incest may have been allowed years ago but time has proven this to be an unhealthy and unwise attitude toward sex.

  4. Doesn't matter

    In native reserves in Canada it’s pretty much a guarantee that brothers will sexual molest their sisters once they start puberty. I’ve heard stories of parents putting locks on their youngest daughters door. Incest is huge in Canadian native reserves, but a lot of the time it’s not consensual. That’s at least what the girls I’ve dated said, but part of me thinks it is sometimes. Usually it’s forced at first i think, then it becomes consensual, but I can’t be sure about this. I know the girl I was talking to about this was in tears when talking about her experiences. I just find it hard to believe such rampant sexual incest is all not consensual. If it’s happening that much, some it has to be consensual

  5. abcde

    i think if there is consent between the siblings and they are enough mature to understand the physical pleasure, its not a bad idea

  6. Hank

    If it is consensual, neither is under age, and if they take all precautions to pratice safe sex to prevent an unwanted pregnancy, the question is: why not? Under such conditions it is a victimless “crime”. They may fulfill in the physical and emotional needs of both. Inter sibling sex is common in many European countries (France, the Netherlands, Russia, the Scandinavian countries), often with the knowledge of the parents (who in many cases will even assist their son and daughter to practice safe sex, and have ample opportunities to be alone together). There it is no big issue and incest is not a crime.
    With the advent of HIV and STD’s, and with reliable safe sex methods, inter-sibling sex is a good alternative to high risk sex with others. Besides, society’s attitude towards sex has changed over the years: it is no longer practiesed mainy for procreation (breeding, such as in the animal world) and practised for recreation and mutual enjoyment.

  7. Paule

    I am here because my partner has recently disclosed to me that he has had a sexual relationship with his older sister while they were “younger” (assuming teenagers, also 5 years apart). Now I have only been seeing him for the past 12 months, but what I can tell is that his whole family is close and functioning. My own family is more dysfunctional then his. He is 40 and seems to be unaffected by it. He also understands that sexual relationships between brother and sister are considered “taboo”.

    I am a very nonjudgmental person, but this I find this concerning, so I’m basically trying to understand it. Is it because I believe it to be unnatural that I find it hard to understand his calmness about it?

  8. Jason Y

    Finding a 2nd or 3rd cousin hot isn’t abnormal but should be massively discouraged anyway. However, there is some inborn resistance to seeing one’s family naked. However, among nudists for some reason they don’t seem to care and of course going beyond nudity is incredibly disgusting.

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