Boyfriend gave me his Facebook password! What to do?

[M]

So my boyfriend and I have been dating for 8 months, and we got along great and are in our mid-20's. He recently gave me his Facebook password, and said I had the privilege to go through it whenever I wanted to. He's also stated that he likes when I take advantage of the 'privileges' he gives to me. I asked him if he wanted my password in return, and he said "no, I'll ask you if I ever want it, but for now, I want you to feel special for having access to mine." Well, ever since he gave me it, I havn't logged in. It just seems, weird you know? At the same time, I am curious to know what's going on in his inbox. I just feel like I'll seem like a weird stalker if I log in! But at the same time, it's like he WANTS me to take up this opportunity. What do I do?