To the extent that sex is like a commodity, guess what - it's for sale! No, you can't buy it from every person who might have it to offer, but not everybody who bakes cupcakes sells them either - you have to go to a cupcake store. If you want homemade cupcakes, you'll have to make friends with somebody who bakes.

Well said. You nailed the point and gave me a good belly laugh.

I think people familiar with ev psych tend to over-estimate the actual differences between the sexes. They certainly exist, but cultural conditioning and supply and demand effects magnify them into gender roles.