"Family and the blind man" joke

A husband and 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 it overloaded and only the wife and the
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 side walk and says to him:
"Why don't you put a piece of rubber at the end your stick, that ticking
sound is driving me crazy!
The blind man replies:
"If you would've put a rubber on the end of YOUR stick, we'd be riding
the bus, so shut the heck up!"