At the time, you thought it was OK, too. In these days, you can't be too careful. Think STDs, crazy people. Only knowing a guy for 2 dates and then sleeping with them well, that sounds like just mutual sex. Not a real relationship. So, I'm not sure how you can feel used. Try not to drink so much on your dates and you'll keep your head clear to protect yourself. I'm not trying to sound mean, just calling the cards as I see them.