We've been recommending quite a few toughies, so this one is going to be a breeze. It's super simple, and can be tons of fun. Feel free to include your own variations, included below.
Variations
For him
- Depending how tall she is, you may want to stand on the balls of your feet. Otherwise, feel free to keep your feet flat.
- Want more power? Stand next to a wall to get even deeper, harder thrusting power
- Yogic? Try it with one leg in the air, why not?
- Slap her ass gently. At this point, if you haven't slapped her ass much, do ask--even playfully, "Did you like that? Want me to slap your ass harder". Just make sure she enjoys that and doesn't just, well, play along.
- Bend over and gently caress her breasts
- Spread your legs for more support (and for more thrusting power)
- Place yourself next to a doorway for, again, better thrusting support
- Rub your clit for added stimulation
- Grab his ass to show him what you like best (harder, slower, faster?)