Men who watches porn

I was having a discussion with my friends and there was a debate whether it is okay for them to watch it. I know that men will be men, but when it becaomes something that they do daily, then its an addiction. But does watching it make them prone to cheating? This is what most women think and it bothers them. This is a serious issue in the relationship, I guess this is something to talk to your guy about and let them know how you feel.