Egyptian Creator God who did it with himself, as in the phrase ‘The Hand of Atum.’
He was the first true God, arising from the OGDOAD’s waters of chaos disguised as a hill. As the original creator God, he made the world and everything in it by performing a certain self-pleasuring act. (Those of an innocent disposition can take this to mean he was chewing gum.)
Top twin Gods SHU and TEFNUT were formed from the resulting bodily fluids. He was later amalgamated with RA to form ATUM-RA but still likes to keep his hand in. We know who his followers are, but we’ll turn a blind eye.
ATUM is symbolized by the setting sun (is there an Egyptian God who isn’t associated with the sun?). Sunsets are his particular thing, and when the sun rises each day he becomes reborn as KHEPRI.