Axilism

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Axilism is the act of sticking your cock into somebody's armpit (preferably a sweaty and super hairy one) and violently thrusting in and out until orgasm. Licking cum from the armpit afterwards is optional. Some consider the act to be masturbatory in nature, whilst others view it as an intimate moment between two lovers. Most are just sick fucks far beyond the limits of redemption.

Although sweat is the preferred method of lubrication for most, it is often necessary [in colder climates] to lather the armpit with saliva prior to insertion in order to reduce the risk of chaffing on your pulsing knob.

What...the...fuck...