Man take off your glasses when you have sex

Why? I never take mine off. I wouldn't be able to see anything!

How? Wouldnt those shit break?

Not unless you're just smashing your face against something. I mean, I don't know what you do in sex, but there isn't much rough touching around my eyes going on. I guess maybe if I was literally facedown into the mattress, I might take them off, but I can usually turn my head or hold it up enough while things are going on