Is it normal for a guy to cum from kissing

I'm 25 and I'm dating someone who's a little on the younger side. He's 21 almost 22. We haven't had sex yet. We were making out a little until he looked nervous and he said he would be right back. I asked was everything okay. He said yeah. He went to the bathroom. I waited a bit and walked in. He was in his briefs and he clearly came in his pants. I asked did he really cum from kissing and he got embarrassed and said that hasn't happened before. I asked was he still a virgin or something and he got even more uncomfortable and didn't want to do anything anymore and went home. Is it possible for a guy to seriously just cum from kissing

Edit: ummm. He was in my house 🤨. It's not like I was just walking in on him in his own home. I didn't mistreat this man. I've had sex with different guys in the past and I've never had one cum just from kissing. Which is why I asked was he a virgin which he probably is because he got too embarrassed to answer the question.