I was a pretty sheltered child. You know, the kind where you can’t have any toy guns or gun-looking products in the house. The kind where you have to wait till you’re 13 to watch PG-13 movies and T-rated video games. All that kind of stuff. For the most part I think it turned out well and that I’ve grown up to be a pretty well adjusted person but that also meant that almost all “bad” stuff I learned was from kids at school.
And of course, you know how kids are. They find that they have some secret knowledge over you that makes them superior and the reign of them asking you what it is begins. My Dad still tells people how his 5 year old son came home from school and flipped him the bird so I guess this was a proud moment for him? Needless to say, this type of thing got repeated with different words/signs on a semi-regular basis.