Heterosexuality doesn't define manhood

It is not heterosexuality that defines manhood, but rather man's sexual desire for men that does, if we look at:

1. Natural incidence: Not all masculine males experience a sexual desire for females, and those who do it do not experience it constantly. Most males who experience a sexual desire for females experience it periodically, often only a couple of times in their entire life.

On the other, 100% of masculine gendered males in nature experience strong same-sex desires.

2. Nature of sexual desire: While the sexual desire for females amongst men is purely of a physical nature and of extremely short duration -- it doesn't lend itself naturally to an emotional or social bond of any meaningful duration and no committment -- the sexual desire for men amongst men, is naturally, more constant, strong and lends itself easily to long lasting, committed bonds.