Well, for one, 100% of males can't get pregnant.
Otherwise, I am having difficulties coming up with things that would prove to you that I am as backward and stupid as you are implying I am by comparing me to scientists who believed such a ludicrous thing. I really do think that 100% of women can't engage in such a casual intimacy without ending up with some emotional damage due to their genetic makeup.
I was trying to show that women have a unique problem with NSA sex that doesn't affect men the same way, and that such responses are biologically built into women. Some women chose to ignore the issues when they are young so it seems as if such things don't affect them, but I've yet to hear or see a woman where it hasn't come back to haunt her when she is older. I just thought I'd add my relatively unique voice to the discussion, because not many men realize that women are built differently in more than our brains and bodies and thought that perspective might add a dimension to the conversation.