Isis and Osiris.
Long story short Set hated his brother Osiris. Cut him to pieces and threw them all over the place. Isis, the wife of Osiris, was pretty angry and upset so she searched for all parts of her lover, all over the place.
She found every part of him except one.
Then she had a child, Horus. Without ….urm….just without “that” part of her man.
End of story.
Carry On Dick!