Testicle size may indicate men's childcare aptitude, suggests US study
Men with smaller testes more likely to take charge of parenting jobs and reacted more strongly to photos of own children
Memorie Hoffman flipped this story into Mems Stuff•3853d
Men with smaller testes more likely to take charge of parenting jobs and reacted more strongly to photos of own children
Memorie Hoffman flipped this story into Mems Stuff•3853d