As a married woman, I am thrilled to have the automatic out of "I'm sorry, I can't date you because I'm married." There's so much going on, particularly in that first year, that there is almost no way to start a deep relationship under those circumstances.
And that's ok--so long as you're not looking to have one of them. But therein lies the problem. Let's face it: most women want to be in a relationship that will hopefully (but not necessarily) lead somewhere. (It's a rare woman who truly wants just a hookup; in my experience, most women are simply lying to themselves about their needs.)
So, yeah, if men (or women) want just hookups, then they should find people who are available for that sort of thing, and if that means dating undergrads (or strippers, or mail order brides), so be it.
Just no playing with people's hearts and creating false expectations. THAT'S not fair...