Might want to watch some of the porn that he does... get some ideas... perhaps if you emulate some of the techniques/scenarios in the porno's maybe you can wean him off of them and show him that you can interesting and exciting in a sexual way.
If nothing else... it will show that you are trying and very interested in him (enough so to meet him half-way). Also, if he's feeling pressured to perform sexually for you... then this may send the message that it's not just all about you - his preferences in sex matter too.
"The weakest soul, knowing its own weakness, and believing this truth that strength can only be developed by effort and practice, will, thus believing, at once begin to exert itself, and, adding effort to effort, patience to patience, and strength to strength, will never cease to develop, and will at last grow divinely strong."
- James Allen