Husband  and wife are waiting at the bus stop with
their nine children.
A blind man  joins them after a few minutes. When
the bus arrives, they find it  overloaded and only the wife and the nine 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 would've put a rubber at the end of YOUR stick,  we'd be riding the bus ... so shut the hell up."  Have Mercy!!!