I think you should evaluate what you're really worried about. If your relationship is good and you know he's a decent guy, then you don't have anything to worry about. It would be worse to make a big deal of it. I would do nothing more than say something in a joke-y way to show that you're aware that he might be going to those kinds of places so he knows you're on to it. But don't get into a fight about it or work yourself up with worry. Let him put this on for his friend without having to feel guilty about you. Most guys do that kind of thing for a laugh. I think he feels pressure to do this from his friends. But you're making it worse by getting him to make you promises. Then of course someone's going to get hurt. Be a big girl, tell him to go ahead and do it but if you hear he does anything he shouldn't he'll get his marching orders ... At the end of the day you want to trust each other so don't set him up with something he'll fail even though he's still faithful to you.
OP here. I think he is feeling pressured too by his friends. He promised me without me "making" him. And like I said he wouldn't be okay with me going to one without him either. I think the problem is now that I am actually worried it could lead to more but I will never know about it. My trust in him is really being compromised right now. His buddies would never "tell" on him or themselves.
And to the poster who thinks this isn't real...yeah, I thought it was already really big of me to let him host the bachelor party at 8 months pregnant or 1-2 months after having the baby as well. The wedding is in July.
And to the other poster who commented on the "tight leash". Like I said, it's mutual, our expectations of each other in this department. I can't help how I feel about it and that it hurts me.