Hidden Nazi
When a man with an uncircumcised genitalia pulls back his foreskin, while limp, he draws eyes above the urethra and a Hitler mustache under it. Later, When he whops out his wang to have sex and becomes erect, the "nazi" is not so hidden anymore.
Before we had sex last night, Rebecca told me that I was her first uncircumcised penis. Therefore I was enthusiastic about letting loose with a hidden nazi.