Eh.. and I thought I was the one with the strictly black and white mindset.. legalistically fundamentalist I'm supposed to be...

No, it is not cheating. What's the reality of the situation? If you are committed to your partner, that's the end of the matter.

He could just be offering you a token of appreciation so suggest you take that at face value... unless you think it might be a bomb or anthrax or something nasty like that...