Studies suggest that high testosterone lowers IQ (Ostatnikova et al 2007). Other studies suggest that increased androgen receptor sensitivity and higher sperm counts (markers for increased testosterone) are negatively correlated with intelligence when measured by speed of neuronal transmission and hence general intelligence (g) in a tradeoff fashion (Manning 2006).
From age 7-33, Black males have the highest testosterone of any race. They also have relatively low IQ’s (~71 in Africa and the Caribbean and ~86 in the US and the Caribbean).
Further, studies verify the dorky nerd who can’t get laid stereotype. In high schoolers, as IQ rises, so does the likelihood of not having experienced sexual intercourse. The relationship holds through university. Even after graduating, higher IQ people have less sex and masturbate less. All in all, the higher the IQ, the lower the sex drive. Obviously this works the other way too. You probably figured this out quickly way back in high school. The dumb guys could barely keep it in their pants and knock up girls early, often and carelessly, while the nerds are dorky, awkward and relatively sexless. I always thought high school was simply a dress rehearsal for the rest of life.
Manning, J.T. (2006). The Androgen Receptor Gene: A Major Modifier of Speed of Neuronal Transmission and Intelligence? Medical Hypotheses 68:4, 802-804
Ostatnikova D., Celec P., Putz Z., Hodosy J., Schmidt F., et al. (2007). Intelligence and Salivary Testosterone Levels in Prepubertal Children. Neuropsychologia 45, 1378–1385