A little Tmi. My strange situation.

Ok here's my odd situation. The only way I can successfully masturbate is to watch porn. My husband has always known this. I stopped for a while, then started again, now my husband feels like I should try and get off without it...but I can't...it's the only way I ever have. what do I do? He's starting to feel almost degraded because that's the only way I can do it myself. He can do it to me successfully,but me alone. ..I only can with porn...suggestions?