Cell phones

Is it normal to go through my s.o.’s phone? All of my fiends find it so odd that I have not gone through my boyfriends phone. We have been together for like 10 months now and we haven’t even peeked at ones another’s phone. I have no clue what his password is and I keep hearing about girls that are going through their mans phones and finding a bunch of shit and I’m not sure if he’s going to make me feel like I’m crazy for suggesting this but I just don’t know how I feel about it