It's always fun to watch the grocery store cashier react to what you purchase. Like when I'm sick and I come to the register with my arms full of over-the-counter drugs. You can see her hesitation to hand me the receipt because she's going to catch what I have. I've always wanted to throw some KY jelly and laxitives into the mix to see if I could get her to visibly shudder. But I always chicken out.