When I was introduced into the mysteries of love by a quite older and very experienced lady, she unfortunately didn't use a language as shameless as her behaviour. She insisted that I called hers "Lady Jane". So I chose for mine "Major Tom", and told her: You also may sir him.
Otherwise I use the usual dialect terms of my county to desribe the parts in question.

Interesting observations when with the peasants over here:
"Let's hang our sprinkle-tools together"
"Let's hide a sausage"

Another observation: A comrade had the nickname Bubi (little lad). When American soldiers heard him called so, they started a big laugh, understanding Boobie. The laugh was even bigger when I was called with the usual abbreviation of my name: Willie. At first we didn't understand their hilarity. So please call me Bill, Will, or anything else, but never Willie.

Wilfried