Why do straight women and gay guys want to have sex with men?

[bisonbison]

They have the tools, but the tools aren't that intricate.

In a creature as concise as a hermit crab we see only the rudiments of the behaviors we recognize in ourselves.

But we're so attuned to and gently and sweetly rewarded for social interactions that a hermit crab or even a ficus can be a good pet. Or a spoon collection.