I'm gonna take you at your word on blindness and help out here. There are a small assembly women in a semi-circle on stage, singing with stearn and serious face

I'm gonna take you at your word on blindness and help out here. There are a small assembly women in a semi-circle on stage, singing with stearn and serious faces what is an aria like song piece, all while vigorously gesturing what can universally be described male masterbation. The camera pans into their faces, and back out to reveal the small group of women to be a chorus of fapping.