Guy wanked in front of me

Hi,

I have been sort of friends with this guy for a while now, when we are drunk we make out and he has been pressuring me to have sex with him but I told him I’m not comfortable yet. Last weekend I somehow ended up in his house and then things got a little heated up . I still told him that I’m not comfortable sleeping with him yet, so he wanked and even climaxed right in front of me. Now everything is all awkward and I don’t know if people do such and I’m not open minded enough. Also why would he do that, is it normal ?