I don't want my husband to talk about nude beaches with other women
Does he do that often?
No, but I don't want him to. It's perverted.
It shouldn't matter, if he is faithful. He should be able to talk about whatever he wants to his friends.
I want to monitor his conversations.
You are being silly. Either you can trust him or you don't. In any case, you can't control what he talks about.