The Thuringian Tower is a complex sex act performed by three people, two women and one man.
In it's simplest form the Thuringian Tower involves a very strong very German man standing upright with his legs shoulder width apart (important for the balance). He is holding and performing oral sex on the middle woman who is a bit less strong but still very German. While being held, she is sitting on the man's shoulders and her legs are wrapped around the neck/back area of the man. On top of her is the second woman. She must be small but can be of any nationality. She is on the shoulders of the middle woman also receiving oral sex. Simultaneous to receiving cunnilingus from the woman beneath her, the top woman is happily eating a Thuringian Bratwurst with spicy mustard.
The sex act is complete when the woman on top finishes the Bratwurst.
Dude! I went to visit my friend in Altenburg yesterday. When I arrived she was at the top of a Thuringian Tower! She couldn't finish the Bratwurst so she tossed it down to me and I ate it. The other two people involved were super annoyed with her.