This happened to a friend of mine. She’s about 13 years older than her brother, and she used to take care of him when their mother was working. One day, when he was about six, she took Richie to MacDonald’s, and was holding him in her arms while they waited in line. He casually asked her, “Sissy, can you put me down, please? You’re crushing my penis.”
This apparently shocked the woman waiting behind them, who looked at him in complete horror. Richie followed up by looking back at her, and saying, “Penis, penis, PENIS!”