口交
Facesitting is a form of oral sex in which the receiver sits on the giver's face and pushes into it with his or her genitals. Oral sex can also be performed by both partners at the same time in the so-called "sixty-nine" position. Spitting and/or swallowing of the ejaculatory fluids or giving a pearl necklace may cause different sexual stimulations. Autofellatio is a possible but rare variant; autocunnilingus may also be possible for women with extremely flexible spines.