Booty Requirements

[mlh2e]

So I'm out with some coworkers/friends this weekend, and this hypothetical was posed to the guys:

You are single and out and about by yourself and are propositioned for sex by a complete stranger (We'll make it a woman stranger). This woman has no horrible disfigurements and is 100% clean as far as STD's go. She is of legal age. She is also unable to conceive, so pregnancy is not an issue. Also, she has zero short-term memory, so no matter how good/bad you are in the sack, she will not remember a thing, so you are the only one, upon completion of the event, that will ever know of it.

I was surprised at the standards that some of my guy friends had, but I suspect that the same question posed without girls around would have completely different results.

So OOT, what honest requirements do you guys have for this?