Correct terms will be taught in this house because they are just words and body parts. Nothing to be ashamed or embarrassed about. Also for to afford them more protection against abuse. They need to be able to say the words if the worst was to happen. It means that there is no way there is a misunderstanding of what is happening.
Though having said that DS is 2 1/2 and knows it as his doodle. But most people would know what a doodle was. We also say penis, but doodle is what he recognises it as.