Not entirely sure what fitness instructor Mary Thornton is driving at here (underwater aerobics?), but it's one of those occasions where you just have to
Boner=Mary+(bikini+H2O) - Think that's the equation...
By the way, did anyone actually spot the nipslip? Thought I maybe caught a bit at the end after the music had sped up, but prior to that it was straight-up soothing cleavage. Glorious.