There was this black woman who had 7 sons, all of them named Leroy.

There was this black woman who had 7 sons, all of them named Leroy.
One day this man was asking her about this and said, "What to you say
when you want to call one of them?" She replies,"I just calls Leroy,
and they all come!" The man then says, "Well what if you want one of
them to come help you with the dishes?" She says, "I calls Leroy,
and they all come help me with the dishes." The man, getting somewhat
frustrated, says, "What if you want to talk to one of them about bad
grades on their report card, then how do you call them?" She says,
"Oh, then I use their last name!"