HA HA HA - part whatever....?

A husband and wife were having "marital problems" and being a good husband and in touch with his wife's needs he decided that he would take her to a shop and buy her a vibrator. They entered the shop and went to the back and there on the wall were all the vibrators. Black ones that shook. Blue ones that wriggled. Yellow ones with little ridges and white one that you filled with liquid. The wife looked at them all and said "there are so many different kinds, I just do not know which one to have" The husband replied " That's all right, just take your time". The wife looked around again and pointed to one and said, " Can I have that red one over there?" "No!" said the husband. "That's a fire extinguisher!"