Asking permission

So I just hooked up with this guy the other night and I stupidly didn’t bring condoms with me cuz I thought he would have some since we planned to meet up a few days prior. When I got there he said he didn’t have any. I’m on the pill so I wasn’t too concerned and he said his sti test came back negative. So we had sex and after like 2 min he just stopped and was like “I finished.” !!!Inside of me!!! I’m kinda mad that he didn’t ask because now I’m freaking out and I had to buy the morning after pill which is like $50. Is it common curtesy to ask before you finish inside of someone? I would have liked a heads up. Other than that detail he was pretty nice so I kinda brushed it off. Would y’all be mad about that?