When you're constipated so bad that you have your husband pee in your butt to release the blockage.
I woke up in the middle of the night not being able to take a shit until my husband gave me a rusty enema.
When a dehydrated man urinates inside of the anus of another person. Preferably without the recipient wiping their butt after a poop.
Get over here you swamp donkey.. I'm gonna give you a rusty enema!