Rubber

Husband and wife are waiting at the bus stop with their 9 children. A blind man joins them after a few minutes. When the bus arrives, they find it overloaded and only the wife and the 9 kids are able to fit onto 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 ticking sound is driving me crazy". The blind man replies, "If you had put a rubber at the end of your stick, we'd be riding the bus, so shut up".

(contributed by Catharine Lee on FB)