Two brothers are waiting by the pharmacy counter while their mom is shopping. They think they're out of earshot from the pharmacy crew...
Younger brother: "Your penis is small. It's like a bug's penis."
Older brother, on cell phone: "Shut up. You're an idiot."
Younger brother: "I have a huge penis. I'm like a horse."
Older brother finds something on phone: "The barnacle has the biggest penis for it's body size."
Younger brother: "No way!"
Older brother: "I found my spirit animal."
At that point the techs and I couldn't hold it in any longer. We all burst into laughter.