Axillary intercourse is a sexual variant where the penis is inserted in the other person's armpit. It can more loosely be described as a man masturbating with a partner's arms. Contact between the hairs in the armpit and on the penis are an erotic stimulant for some adherents to this practice. The partner has control of the pressure exerted on the penis and often exerts variable pressure to the man's thorax with the elbow.
xillary intercourse is part of the broader category of outercourse. It is among the safest forms of safe sex since the genitals are greatly separated, allowing little to no exchange of bodily fluids.
Obvious complications include axillary hair (armpit hair). Axillary hair can help minimize friction, but can cause major discomfort in the armpit due to pulling and tearing of hair out of the follicle.