Why not share fantasies? Ask him what gets him off about the photos and while he describes his fantasy, seduce him!
There are one or two encounters from many moons ago that still get me going. Whenever I share them, inevitably there's a twinge of jealousy for a moment, but relaying the details gets us both going and then he recognizes that the past encounter is now fodder (yeah, probably the wrong word!) for our passion, so the jealousy is gone when it's re-enacted with him. It's a win-win as the memory is phenomenal and reliving it over and over again is amazing, plus he keep asking to hear about it again.
Use it to your advantage. He keeps his fantasy and you can share in it.