(Telegraph) Men brought up with women are less sexy
By Richard Alleyne, Science Correspondent
2:08PM BST 22 Oct 2010
Men who grow up with lots of sisters are less sexy, a study suggests.
Having a large number of female siblings makes men no less heterosexual but their mannerisms and body language may be seen as less butch than those who have been brought up amid the rough and tumble of a male dominated household.
Researchers discovered the ratio of male and females within a family growing up together can influence the sexual behaviour, rather than the sexuality, of a boy who is outnumbered. Genes may determine personality and behaviour but the environment during early life “shapes it” said the study published in the journal Psychological Science.