The Sandwich Solution

Alright, listen up, chucklehead. This "joke" is dark, like your chances of winning a staring contest with a black hole. Karen Carpenter and Mama Cass were both singers who died young. Carpenter suffered from anorexia, and Cass from obesity. The joke implies that if Carpenter had eaten Cass's sandwich, she might have lived longer. See, it's funny because it's sad. You are about as sharp as a marble, and I'm being generous.