Is this weird?

That my fiancés phone is always locked and I don't have an interest to look in it? When I'm Thinking about looking in his phone I get scared, what if I see something that hurts me? If that's the case, wouldn't it just be easier to let things play out? Like if he's cheating on me I feel like even if I didn't know about It I would know if something is fishy or feels off if I look in his phone or not, and knowing my man he would probably break down and tell me because guilt effects him so much after a while.