Boyfriend and boundaries

What to do when your boyfriend goes on a trip with his friends and you know that their friends (and him) will go to places and pubs to look other women and comment if they are hot or not? I find it disrespectful but he says that he does not do that as much as they friends and it’s in an innocent way. However it gives me anxiety because of a possible infidelity… It’s like having mixed feelings about letting it go or making a big deal of it.