My boyfriend suddenly put a password on his computer for no reason!?

Okay, so when I'm at my boyfriends house I sometimes use his computer to check my emails and Facebook and it's never been a big deal the whole time we've been together (almost a year). He knows I know he watches porn and it doesn't bother me because I watch it too so that's not a factor. He would always leave his email and forum tabs opened so I could see everything he was doing even though I never looked at them anyways. What's bothering me is the other day I went to use his computer and now there is suddenly a password on it. It looks a little suspicious to me. Am I wrong?
It's not about porn and it's not about snooping... I have never snooped as I just said in my question he has given me opportunities to and I never have. I watch porn too we both do
I'm 25 and he's 27

If it truly bothers you, you should talk to him about it. Such things can cause issues in a relationship, which is something I am sure you want to avoid. And perhaps he doesn't have anything to hide, you will not know until you ask him

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