We love it! The whole idea of combining S/M with exercise is perfect. The personal trainer as a Mistress is a match made in heaven... uh, made in the gym... uh... the dungeon. Yeah! That's it.
It's one thing to watch a shapely pair of buns bending over while a gal tries to touch her toes. But doing it while suspended from the toes (feet, actually), with the boobs slappin' the upside of the face is a hoot... or that hooters? Just a great concept.
Slavegirl sez: Ten more push-ups or I'll whip your ass, slut!