strip club

My SO went to a strip club a couple years ago with friends when we were on a break and spent $300... yesterday we had friends over and the guy friend was talking about strip clubs and it got brought up again and my SO was saying he wouldn't go back because he wasted so much money in the private room and I just feel so uncomfortable about the whole thing, I'm not sure why... I know it was in the past and I have nothing to worry about it but just thinking about him watching a girl with the perfect body dancing and doing god knows what makes me feel really insecure and gross..... any one have an opinion? :/