A childhood belief about weeing and pooing

When I was a child I had a playmate named Iris. She was one of the most fondly remembered playmates I ever had. Only one thing, in retrospect, might have been wrong with her. She told me that she didn't poop. She said that was why she was named for a flower. She said that some girls don't poop and they are named for flowers because flowers don't poop. I believed that for some time, at least until after my brother, who is a good bit older than I, got married. Then once I went to see the movie GIRL, INTERRUPTED, with a group including my brother and sister-in-law. In this movie, set in a girls' mental ward, a crucial plot point revolves around a girl named Daisy becoming constipated (probably because she won't eat anything but chicken!). She wants laxatives but the staff won't give them to her. So she ends up trading pills that some other girls want for the laxative that she wants. Durring that part of the movie, my sister-in-law heard me making curious questioning sounds and saying "That makes no sense at all!" After the movie my sister-in-law asked me what didn't make any sense at all about the movie to me. Naturally I was reluctant to tell her, but she said "Come, on you can tell me!" I tried to get off saying "It made no sense that they named the character 'Daisy'". But she got if anything all the more curious and begged me until I told her the whole story, about how Iris had told me that girls with flower names don't poop. She burst out laughing long and hard. But when her laughter finally subsided, she told me she was sure that everyone poops, even girls with flower names. Not long afterwards, she was among several relatives riding in a van with me. My sister-in-law whispered in my ear, "I hope I can make it to the next stop! I gotta poop real bad!" Then she added, "Call me by a flower name and see if that can help me make it." So I said, "Okay, Rose," and started calling her that. I guess I called her "Rose" at least five times before the next stop. Afterwards, she told me that she made it without crapping in her pants, but calling her "Rose" never seemed to lessen the urge in the least. A few of the others in the van had asked why I was calling her "Rose" when that wasn't her name. I never told and I hope she didn't either.