The reverse cowboy is a sex position that requires quite a long penis and a flexible one. The man must have experience in bending his penis downwards in order to have sex, or else he might get hurt. The woman is down on the bed on her knees and elbows, and her head is slightly bent down.
She arches her back and lifts her bottom so she can be ready for the downward entry from her lover. The man stands at the back of the woman, facing the other way. He bends from the hips and touches the floor with one arm, while the other hand is positioned on his knee.
The man enters the woman while they are facing the opposite direction, and the penis must be bent downwards in order to perform this position. It is not easy to do, and it is not good for fast pacing.