In childhood this question seemed tricky. Let's see if its tricky now or not?
A mute person walks into a shop and wants to buy a toothbrush. By imitating the action of brushing his teeth, after successfully expressing himself to the shopkeeper he makes the purchase. Next, a blind person comes in to the shop wanting a pair of sunglasses. How did he indicate he wants them?

answer:
well I guess he would just say it.