I would suggest that you perhaps mention one or two little things and see where he goes with it. Alternatively watch a film like "The Secretary" together, snuggle up and make sure he knows you are getting turned on, have your wicked way with him on the sofa and tell him after that you were turned on by it and couldn't help yourself. If it is not his scene then at least you both had some fun, if he is interested then take it away lol. Another way would be to get a novel and read it in bed then let him know you are turned on. Good luck and if you have any questions then just ask.