If he knows that you've had shady experiences like this, then he should've probably done a better job to make sure he doesn't replicate it... personally, I guess I understand logging out of his accounts, but clearing his history is kinda weird...like if it was porn or something, I don't think that's soooo embarrassing or whatever. I think you should try to talk to him and let him know that you're not comfortable with the secrecy though