Jantje

Little Johnny jokes are about a small boy who naively poses questions and makes statements that are very embarrassing to his "grownup" listeners (such as parents and teachers), and has a very straightforward way of thinking. At times he is well educated in the terminology of sex, while at others he is all too innocent. The jokes may also include a female counterpart, typically named Susie.
Joke characters similar to Little Johnny are known in many countries.
The Italian character... meer