What is Blind Man's Folly?
1.
To ejaculate into a sexual partners eyes (male of female, preferably female), then to quickly reverse position while the partner rubs the eyes in pain and penetrate the anal cavity with a powerful thrust.
Just givin' the ol' Blind man's folly to Winona really gets me off.
or
Connor that bastard did the Blind man's folly to me again last night!