can you laugh on your own jokes?

A teacher told her class that they were going to study e-bonics. She would give them four words to make into sentences. They were RED, NACHOS,FASCINATE AND MOTEL. Little Mary raised her hand and told the teacher that she could. She said "I have a RED dress." The teacher said she meant to make sentences using all the words. Little Mary said, "I have a RED dress, its mine NACHOS, it has nine buttons down the back but I only FASCINATE and every time I bend over, my sister says she can see MOTEL.....

Of course i can laugh at my own jokes! If i can't, then i don't see the point in re-telling them. You should always find a joke funny if you are going to tel it.