SDDE-590 Nude marriage party

This is a work adopted from a user-requested project. The content revolves around a marriage party where people who want to find partners with compatible sex lives gather. Instead of considering income, occupation, or appearance, they choose someone whose body is compatible with theirs. Strangers show each other their genitals, lick each other, and have sex to judge each other. They shouldn't break up due to physical compatibility.