We have the 'double uterus mutation, so why not have an equivalent for the kings we all know and love? An alternative name would be "Diphallia" or "Polyorchidism". Now you know.

This mutation would not be present in the lines. This is a 16+ site, sure, but nobody would be comfortable with seeing four lion balls poking from under the legs of their kings when they are trying to work on decoration and stuff. (Before you say "but that's how it is in nature excuse me" this is a game. Just.. no.)

Now for the benefits of this mutation:

A lion with this mutation WOULDN'T be able to mate with two lionesses at the same time, (They're lions, not pornstars) BUT they would be able to increase the chances of:

-Getting a better chance when claiming lionesses because.. hey ;)

-More impression from each breeding. You know why. ;)

-Getting more Stud slots!

The mutation could pass down with a low chance, just like many others. (Strangely enough, DU can't pass that well.. uh.. okay.)

Lastly, tell me what you think! I think this mutation could be pretty whimsical- it would probably lead to lots of naming shenanigans, I bet.

EDIT**
Please take the suggestions below into consideration!

@Voyzeck:
"what came to my mind is just that the mutated lion could maybe have more stud requests open? that seems not too op!"

@Shiinor:
"i think the king would have more stud requests for the week instead of the usual 15(theres 15 right? God i cant remember)"

@Aleu loves Wenet:
"I definitely back the stud slots raising, perhaps to 20. The pass rate, if working like DU's, would not be op in the slightest."

"An idea tho, may be you can gain impression from each breeding? That doesn't effect the rest of the players too much."