No kissing after blow job

Britt • Period Tracking & Staying Healthy!
So I've been dating this guy for sometime now. I'm still a virgin so we've never had sex but Saturday night it got hot & heavy super quick and we did oral. He went first and then for the first time I gave a guy a blowjob. I actually liked it and he was completely into it. BUT right after he came, I tried to kiss him and he shook his head "no". He seemed grossed out  that I would try to kiss him after giving him a BJ and I don't understand. I mean it's his penis and semen lol plus he kissed me right after he finished. Does anyone else's guy do this? I'm a big kisser so when he said no, it was a major turn off for me.