He's obviously not too bright. Take advantage of the situation.
Tell him you'll sell him your "sexy jeans." Figure out a price where you can make a profit after shipping costs and everything. Buy some new jeans, pull off the tags, run them through the wash once, package them up and ship them to him.
Or you could really send him your old jeans and get all new jeans... Maybe you could find more trolls with other clothes fetishes. You could get a whole new wardrobe for free!
He's happy. You made a little cash. Of course, he'll probably attack your wife and kids, but hey, that's a small price to pay to get ahead in the world.