Definition: The cowgirl position is a sexual position in which the giver is laying down or sitting on a chair and the receiver sits face to face with the body of their partner between the legs or where iit's possible to aligne the vagina or anus to facilitate penetration.
The name comes from the image of the couple fucking "riding" like a cowboy or cowgirl ride a horse.
Is one of the positions where the receiving parties is on top, and another one is with the receiving party showing their back to the other instead of being face to face. This position is also used abefore the lateral penetration position supported by Maters & Johnson.
The penetration is quite deep, and the receiving party can control the deep of the penetration and the speed of the movement if the fucking party doesn't move. Besides, any of the parties can stimulated the other's genitalia with their hands. Women can also receive clitoris stimulation if her partner eventually takes the penis out and rubs it against it.