Someone here recently posted this website
http://devotionalsex.tumblr.com/
about devotional sex and I've found the idea quite appealing.
I have an ex who I'm still on excellent terms with and we were talking
one night when I decided to see what she thought of the idea.
Now she's generally more vanilla in sexual taste so I told her to look
through the archives and pick out pictures she found interesting
http://devotionalsex.tumblr.com/archive
and to read the captions of those. She was quickly fascinated by the
idea as well. If there weren't 1.2k miles between us things might've
become interesting.
It can be played with either gender being the top, despite this site
being written by a male knight. I think he has some posts wither on
the blog or his wiki that give alternatives for reversed roles.
Who knows, maybe you can find a way to do it both ways at once.
It seems like it could actually work quite well if the right approach
is taken.
Hope this helps!