Why do guys do this?

It means he's possessive and the jealous type, and you should have reason to not trust him as much if he won't allow you to access his. It could mean he's not being faithful, but it's hard to say.

Dating two years, and living together for 8 months? I think that entitles phone access... if he looks through yours, you should be able to look through his, it may be nothing, he may just be paranoid about it, but if he's being OVERLY-protective of the phone, try n catch him off guard n get the phone from him when he's not around...

Yea, there might be things that he does not want you to see.

Or, we as guys do not have the memory that you women have. We don't remember everything we do, the color of our shirt we were wearing when we met you, or who we talked to 5 seconds ago. I have a lot of other girls numbers in my phone, and I talk to a lot of girls too. That doesn't mean that I am doing anything, but I don't always want my girl looking at that because I wouldn't want her to get the wrong idea. Mostly because I don't want to have to get into something to explain myself, or even have it brought up. That may be the case with him,... but again, if he is very protective of it, there might be something going on (I don't like it, but I still will let my girl go through my phone if she wants, not that she does though).

Best of luck.

If you have access to his personal information then everything should be fine. but if he gets like really crazy about you getting on his phone then I'm sorry he does have something to hide. you should try secretly looking into it, when he's in the shower, sleeping, just went out real quick to the car, went to the bathroom for any reason. the moment you get it look in to what you want to look at first. don't do too much at once though because you'll waste your time and take too long. take steps even though I know how eager you are to look into his phone. think about what you want to see first. whose on his contact list? who calls him alot; incoming, outgoing and missed? who text messages him and vise versa? whats in his pic file. and so on take steps and have plans. BUT when you see a girls name don't pannic later on just think about a fony story to say or make a VERY GOOD BUT NOT OBVIOUS REASON about that person and just see his reaction like you saw that person at a store or something and for some reason she knew you were his girlfriend? so how do you know her? or her friends saw you and said something about them two? so how do you know her? just play cool never forget that. beacuse in any reason if a man is hidding his phone from you even if its his most personal item he carries, if he can live with you and tell you he loves you and so on, then I'm sure he can share his phone with you. if he can't show you then there's gotta be something wrong with that.

In my experience when someone is suspicious of you for no reason it has almost always been because they were the ones up to no good. If he is going through your things wither he feels insecure about how you feel about him or he is doing something he wants to hide and thinks maybe you are. I know that sounds a little cocky but trust me on this one. Have you confronted him about it? Have you asked him why he feels he needs to go through your personal things?

You don't have access to personal info. If he can look in your phone, but you can't look in his, what is he hiding?

Put a PIN on your phone. He should not be snooping through it, especially if he is holding you to a different standard. What is good for the goose is good for the gander.

He could be doing things behind your back, but maybe he is just really paranoid when it comes to people touchiong his phone. To me it sounds like a bunch of bs! If it keeps going like this, confront him and find out what's up. If you guys are true to eachother then nothing is too personal or important to keep from eachother!