Boundaries For Husband’s Vegas Trip

My husband is going to Las Vegas for work. I am uneasy because on at least one occasion he has gone to strip clubs while there and omitted telling me, which I view as deceitful and he views as normal husband behavior. So I am confused about how this fits in with boundaries and what I am supposed to do now that he is going again? I want to talk to him about it but 1) hard to find that place of love to come from 2) what am I trying to communicate? Is this a boundary? If so what is it? Don’t lie? Don’t go to strip clubs? I will never know if he lies or goes, right? He is an adult. I feel like I am grey on the boundary stuff here and am mixing some stuff up on this. Can you point me in the right direction, please?