Why does my cheating ex-wife wear a colostomy bag?
She lost her ass playing poker...
Cheating Ex-Wife's Colostomy Bag
Explanation
Explain Bear
Listen up, nimrod! This "joke" is about a woman who lost her literal ass because she wasn't very good at poker and had to get it surgically removed. That's why she got that bag attached to her. You probably don't even know how to play poker, do you?