The rubber on the stick

A husband and a wife are waiting at the bus stop, and with them are their nine children. A blind man joins them after a few minutes. When the bus arrives, they find that it overloaded and only the wife and nine kids are able to fit in the bus. So the husband and the blind man decide to walk.After a while the husband gets irritated by the ticking of the stick of the blind man as he taps it on the sidewalk and says to him: "Why don't you put a piece of rubber at the end of your stick, that sound is driving me nuts!"The blind man replies: "if you would've put rubber at the end of YOUR stick, we'd be riding the bus, so shut the hell up!"