We have the penis of a monogamous primate yet our body sizes suggest our ancestors slept around a lot.
Morning penile erections affect all males, even males in the womb and male children.
The best way to prevent head and neck cancers, which are more common in men, is to get the HPV vaccine. It's free for boys and girls aged 12 and 13.
It might be juvenile, but scribbling a dick and balls on a ballot paper actually requires some thought. And that in turn has meaning.
Men with Klinefelter’s syndrome are infertile, as the extra X chromosome affects the ability to produce sperm.