Husband on Reddit

So I discovered my husband looking at inappropriate stuff on Reddit. It’s Porn but what bothered me is that he’s looking at a group based on our city where we live so like wtf? Since I discovered this I snoop through his phone everyday it’s been a week & I haven’t found anything like him cheating & I feel like he wouldn’t dare to cheat cause he knows I’d leave in a heartbeat, but I’m conflicted. If it was random Porn ok, but this isn’t random?? I want to confront him but then he’d know I’d been looking through his phone. Any ideas??