Hi, interesting discussion. Just adding a few thoughts really.

From an evolutionary standpoint, our ancestors were quite hairy. Maybe the question shouldn't be why we have hair, but why we seem to have lost so much of it. And as Linear said, this does vary quite a lot in different populations. The tops of our heads certainly would be vulnerable to UV from the sun and our hair there probably protects us, though that doesn't explain why we have it elsewhere.

I think, also, that evolution itself is not one-and-the-same as the theories which explain it. That the fossil record shows changes in organisms over a great span of time, seems to me beyond doubt. We think we know the main ways that this has operated. I feel sure that we do not understand them all. It seems rather silly to look at questions about the mechanisms of evolution and instead of trying to answer them, saying that these questions disprove that evolution actually occurred. It's like denying that gravity exists because we don't know how it fundamentally occurs. (Isn't that intriguing BTW.) Not fully understanding how it comes about, doesn't stop us from observing its existence and its effects on the macroscopic world.

I seriously think that morphic fields and consciousness have also shaped evolution.

Beards on men? Sexy, when well groomed and not too long. Maybe there's something about sexual selection there after all.

Speaking of God's design, can someone suggest a reason why a man was designed in such a way that a knee in the groin incapacitates him? Men are pretty vulnerable there. Can anyone offer an argument for this being optimal design?