A somewhat challenging sexual position which has the receiver lay on their back. usually on a padded floor, with their lower back and legs raised all the way up so that their ankles are either side of (and beyond) their own head. The exact end position will depend on the flexibility of the receiver. This position totally exposes the groin area to the giving partner who stands astride the receiver's groin to perform. The giver squats over the receiver, facing her, and moves up and down on the receiver to create friction. The giver is also able to use their hands to caress and explore their partner's lower body.
This is a sexual position that requires considerable flexibility on the part of the receiver and it cannot be (fully) achieved by most. It is advantageous for its feeling of being totally exposed and "giving it all". Those less flexible might try getting into the position, but stop at the point where the position starts to become uncomfortable. The giver can also help those less flexible by using their hands to support the receiver's thighs at mid-point. The giver should be careful not to over-extend the penis beyond what is comfortable at this unusual angle (penis pointing downwards).
They were ready to kick their sex life up a notch, so they tried things like the Pile Driver
A sexual position where the man is standing, the woman is lying on the bed with her legs up in the air, he is inside her and is holding her ankles. The woman's legs are then crossed over, so that they form an "X" between the couple. The man then grasps her right foot with his right hand, and her left foot with his left hand. This has the added benefit of tightening her grip on the man's penis. Her legs will now look like handlebars, and her feet, the handlebar grips. At this point it is best to make motorcycle noises and twist the right grip (her right foot) accordingly. Optionally, the woman can make the motorcycle noises.
We did lots of crazy positions, but the best was the motorcycle fuck.
A challenging sexual position where the man enters the woman doggy style, then moves his legs outside her flanks, then raises his knees and places his feet flat on the bed or floor. Maximum penetration can be achieved this way, more than doggy. It can also be hard on the man's legs to maintain this position for any length of time.
It is also sometimes called 'Bulldog' or 'Spider Monkey,' but the latter term can be confused with 'Half Spider Monkey' wherein the man puts only one foot flat on the bed/floor, and the other leg's knee rests on the floor, as in regular doggy.