Some of Egyption mythology reads like the weird doujins you find when you've gone way too deep into e-hentai:

Now afterward, (at) evening time, bed was prepared for them, and they both lay down. But during the night, Set caused his phallus to become stiff and inserted it between Horus’s thighs. Then Horus placed his hands between his thighs and received Set’s semen. Horus went to tell his mother Isis: “Help me, Isis, my mother, come and see what Set has done to me.” And he opened his hand(s) and let her see Set’s semen. She let out a loud shriek, seized the copper (knife), cut off his hand(s) that were equivalent. Then she fetched some fragrant ointment and applied it to Horus’s phallus. She caused it to become stiff and inserted it into a pot, and he caused his semen to flow down into it.