Hey! How do you know that about my boyfriend? Kidding. ;)
I agree with Kelley Harmon that your bf probably just likes sex. For any reason. Cmon hon, it's Easter! Let's have sex. I did my taxes so let's have sex. Ummmm...I like your shoes so let's have sex.
Also, men find sex relaxes them. I've heard that one reason men well, ah, masturbate is that it is a major tension reliever. So it is great that your man wants to blow off his steam with you! If he were closed off in his heart due to the fight, he wouldn't ah, include you in his relief methods.