Love the idea - Something about the idea of "taking him from behind" turns me on more than just about any other fantasy. But he won't let me get anywhere near the area for any reason.
I'm with LikeMinds and her penis envy. One of my earliest sex dreams (at least of those I remember) centered around me growing - and using - a magnificent penis. I have gotten to use a strap on twice with a female partner. The first time was interesting but somewhat disappointing as she rode me - I felt like little more than a dildo stand. The next time was quite erotic. I was on top that time, and I stared into her eyes as I entered her, seeing her pleasure. Very thrilling. Made me feel powerful in a different way than my usual feminine wiles. And hubby liked watching.
Hmm. I wonder if I could tempt him to suck on it rather than "host" it.......interesting thought.....