Penile fracture. It’s a real thing. Usually occurs during girl-on-top or ‘doggy-style’ positions when the penis slips out of the vagina and forcefully strikes the pubic bone of the partner. Though it is referred to as a ‘fracture,’ it’s more of a rupture of the tunic surrounding the erectile bodies.
It’s a surgical emergency and failure to investigate and repair the defect may result in lifelong erectile dysfunction or missed concomitant injuries to the urethra. Despite the urgency, one patient I saw was adamant that he injured himself while roofing his home in the middle of the night