Internal Combustion

A masterbation technique in which the user takes a shower while masterbating. At the exact point of climax the user simultaneously switches the water to ice cold. Creates an extremely relaxing effect.

I preformed internal combustion in the shower and I feel so relaxed!

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Internal Combustion Engine

Its an engine you moron

"Thats an internal Combustion Engine"

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Spontaneously internally combusted

Whenever something randomly explodes because of a teamswitcher, buster the combuster, suicide ɓomɓer or a buster

OH MY STOP COMBUSTING IN MY FACE sorry I meant spontaneously internally combusted