Hook-up

So I was hooking up with this guy, a different guy than I did last night which is unusual for me, and I ended up crying in the middle of it. Well, I made him stop, which he did, and he just kind of got dressed and left. I'm not really offended because that was the first time we had officially met and we had agreed no emotions and everything over text but I have no idea why I started crying and I'm so embarrassed.