Soarin and Rainbow Dash have been a couple for a while now. With the dominant mare wanting to try something new, she comes home with a device in which she will have all the control. How will things turn out when Soarin doesn't get to orgasm when or how he wants? More importantly, how long will this last, or will strong love be the first priority?

What is this wonderful device that Rainbow comes home with?
Hint: It's literally in the title.

This is more romance than porn, but I put both to be safe.