Twilight Hue
Twilight, not bright nor dark, good nor bad.
That's just not true. If your talking strictly human biology here.Sorry that you were hopeful, but I do have to say something.
Same as sterile women. Are gay men not physically able to impregnate women? Are straight men required to impregnate women?
Going by your reasoning, heterosexuality is also not biologically efficient.
My point is, homosexuality has nothing to do with biological efficiency. Just like it has nothing to do with morality.
There's sterility with heterosexual couples, sure, but it's a very low figure, and obviously not an outright impossibility.
Men don't get pregnant. Women don't get pregnant without men.
It's pretty straightforward here.