I've noticed that a lot of adults have "pet" names, for lack of a better term, for their genitals whether it's by choice or lacking the knowledge of proper terminology. I personally didn't know all the correct terminology until I was a junior in high school, taking anatomy. Not every kid in my high school took anatomy. We were given the choice between chem and anatomy. Most of the kids in my high school didn't get a well put together sex education unless they decided to take child development. We got "this is a condom. This is a tampon. This is deodorant. Use them." So it was left up to parents to fill in those gaps (with the exception of those taking CD).