Should I be scared?

My boyfriend when he is about to cum likes to take his condom off and cum on me. Not in me but below my belly button. He says it "makes the experience better" I don't mind that he does this. It's just I'm scared it may accidentally hit some place else. Am I over reacting? Or should I ask him to stop. I had him take a picture when he did it again I pretended to laugh so I can get the picture.