Oil rigger
You’ll need 3 things, big meaty claws, activated charcoal( to make it black), and a volunteer. What you do is you make the volunteer eat the activated charcoal and you stick your fist up there ass so damn far and you proceed to I hydraulically pump there ass with your fist till there black shit spews out like a oil rig.
Dude that orgy was great, I did the ol oil rigger on a innocent victim