Blind is a turn often used to describe the visually impaired yet has a true meaning lost in translation...
A person who needs glasses to see is the purest form of blindness. Nobody understands their pain because they assume the glasses help them see just a little bit clearer when in reality, no matter nearsightedness or farsightedness, the accumulating blur that becomes your vision over the years of letting your eyes use bifocals as a crutch becomes humiliating. The slight wrongness of your sight is like having a popcorn kernel stuck up your a- I mean, in your teeth. And when fate leads you to be unable to fix a slight irritation, either by a scratch on your lenses or the way you look without your glasses on!...that is true blindness.
Todd: "I thought you were nearsighted...?"
Fabio: "Don't fucking bully me my pain is far greater than any of your peasant mind can handle!"
Todd: "Ok, good point. Your glasses are on your head."
When you blindfold your wife and give her a dick that she deserves and desires without her knowledge. You then pull the blindfold off your wife or girlfriend and reveal the cock that gave her the ultimate orgasm that she has always been craving.