I don’t know if it’s possible to orgasm while horse riding, but I know that in the past I have been turned on and stimulated fairly well just by riding the horse. 😀 It just has to do with the position the girls sit in, and the movement of the horse… the friction of whatever the girl is wearing against the clitoris. Sometimes its too rough against the body but other times it’s a nice little secret to have while riding the horse.