Most Helpful Guy
So you're "not nosy" and you "trust him", but sometimes you "get doubts?" It seems to me like you don't really trust him 100%, otherwise you wouldn't care if his phone was locked or not.
Personally I wouldn't mind giving a Girlfriend access to my phone, but if I found out she was snooping on it I'd fee kinda betrayed. And trust me, there wouldn't be ANYTHING for her to find because I'm not the type that strays AT ALL.