i think that, just like with any activity, massage or simulated voyeur would be much more successful as video than just pics. think of watching a guy undress in motion, rather than just pics. he slowly lets his pants drop, then leans down to pick them up...

video would rock for this!

whether the video was sexually explicit would depend greatly on the video. i could easily see ways to shoot both as non-explicit, but you'd have to be careful.