The Tor is a great pick!
Cock rings are good if he's shown an interest in them before. In my own head, I equate them to rabbits--they can be a bit intimidating to an unsuspecting person.
I'm with B8trDude and Goth--if you don't have a problem with his masturbating, a tenga or fleshlight would be good. I got my sweetheart the LELO Bob after he expressed a passing interest in prostate stimulation, and it was perfect. It wasn't a cheesy first time, and the sincerity of such a nice gift eased his mind a bit that I wouldn't make fun of him or his interests. Bob opened up a new door for us.