A man and his new girlfriend undress together for the first time. The man reveals deformed toes, explaining: "I had a childhood disease called Tolio." The girl asks, "Don't you mean Polio?" He replies, "No, Tolio, it only affects the toes."
He takes off his trousers, revealing a discoloured pair of knees. "I also had Kneesles," he says."Don't you mean Measles?" she asks."No, Kneesles, it only affects the knees."
Not wanting to ruin the mood, she pulls down his boxers, bursts out laughing, and says: "Wait, let me guess... Smallcox?"