Robin's Mask

When you straddle your (ideally, much younger) boyfriend and pull a batwing {stretching ones' scrotum until it resembles a bat's wing} over his eyes.

To get the part, Joseph Gordon-Levitt let Christopher Nolan give him a Robin's Mask

Batgirl's Wing Batwing Electrolysis Ben Affleck Matt Damon

by Peter Thrustington, III May 20, 2016