The ins and outs...
Him: Leaning on his arms that are stretched out behind him and sat cross-legged, his thighs spread far enough apart so you can do your thing!
You: Climb onto your partner, facing him, and trap him between your legs. Start with slow up and down thrusts, on the right side then towards the left. Go up and back down. Find the tempo that you like. Cowboy hat = optional.
Why is it so good? Because you've got the power! You're in control of the rhythm and depth of the movement. Making intense eye contact, you can challenge him to resist you while you enjoy a sexy rodeo.
A good time to try it: When you're feeling energetic and want to take control! It's also a good way of letting your anger out after you've been quarrelling with your man...
Tip: He might get cramps, so suggest he leans against a wall to free his arms and hands...he should have no problem putting them to good use.