non-penetrative sex, that involves the stimulation of a man's penis by a woman's breasts and vice versa.[1]
Cunnilingus is oral sex performed on the vulva, while fellatio is oral sex performed on the penis.[1]
a manual sex act involving a person stimulating the penis or scrotum of another by using the hand.[1]
or back, and either the man or woman inserts the man's erect penis into the woman's vagina or anus.[1]
extent and duration of penetration and because of its ability to adequately stimulate the clitoris.[1]