blind fold him...maybe he is having trouble focusing
I COMPLETELY understand your concern and your feelings. I have experienced the same situation recently. Though I haven't said much about it to my partner. Honestly, I don't think there's much you can do if he isn't open minded, however I can suggest a solution I found myself. XRock is a natural herbal supplement that works almost instantly to bring on fuller, harder, and longer erections in men of any age. So a boy as young as 16 can use it without any harmful side effects. I just bought some for my partner. They have trial packages as well as full 30 day bottles and are very inexpensive in comparison to other products. I haven't tried it out yet because I haven't received the shipment but I have heard a lot about it and I would definitely say it's worth the try. It enhances performance and drive so he won't be able to resist wanting to have sex with you. =) I hope this helps.
He may have a problem masterbating. Or masterabating to porn..