2 Girls 1 Cup

Two girls go on a lesbian date and share a cup of ice cream, typically seen as crossing the "first threshold" in a female homosexual relationship.

Girl1: Want to do a 2 Girls 1 Cup with me on Friday?
Girl 2: OMG I thought you'd never ask!

Mom: We're very proud of our daughter for coming out as who she is and doing 2 Girls 1 Cup with her new girlfriend!