.....WTF WAS THAT???

It's a lot more detailed than this, but here's honestly the abridged version. Find interesting girl looking for short term, casual sex. I sent her a message two days ago. We chatted a bit before this morning, but we talked for a few hours this morning. Talk turns to hanging out. Out of left field she asks when the last time I got any action was. I answer honestly about my last tryst a week or so ago, SHE FLIPS HER SHIT. Calls me a slut. I call her on the hypocrisy of a someone looking for casual sex calling someone who has casual sex a slut. Met with the response of "I know, but you're slutting around was more recent than mine. Don't text or call me again" She went on to say how we could have had something special, but I blew it because I can't control myself. WTF???

TL;DR Girl looking for casual sex blows up on me for already having casual sex.

EDIT: Just for clarification, I was not looking for casual sex. I don't go around sticking my dick in anything. I have a FWB, but we always use protection. I wasn't posting this to bash on her, I posted it because of how baffling the situation became.