My sister and I were counseled by the elders for getting too giggly during a book study.
The elder leading the study on the Family Book had previously talked about using "proper names" for genitalia, and he even said not to use nicknames that referred to bells when talking about boys.
He was bald, and his shiny head looked like a penis, so my sister and I started calling him Brother Dingdong or Dingaling behind his back. One look at that gleaming head during a meeting, and we would start with the puerile penis jokes and start poking each other and snickering.