In positions like the Pile Driver that involve lifting body weight, sex counts as a high intensity interval training (HIIT) move that ramps up cardio, and improves flexibility and strength while burning fat--so you look good naked.
Tops get a workout from squat-like thrusts and stabilizing the core while doing the Pile Driver.
Bottoms get the benefit from stretching, which helps improve flexibility
Read the facts about HIIT the Bedroom.
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