A sex position for two characters sitting upright in which the receiving partner sits on or astride the penetrating partner's lap, getting penetrated from behind. Compare to [[upright straddle]], in which the participants face each other. If the penetrating partner is lying on his or her back, this becomes the [[reverse cowgirl position]].

Also known as the champagne room position.

h4.See also
* [[girl on top]]
* [[reverse cowgirl position]]
* [[reverse suspended congress]]
* [[sitting on lap]]
* [[upright straddle]]
* [[Tag Group:Sexual Positions]]
背面座位