As many as possible, and don't *ask* what they do with the old bulb.
or
Three skunks fighting over a pickle
First dog: My master calls me Furball. How about you?
Second Dog: My master calls me Sitboy
or
the barman says "Oi - get out! We don't want your type in here"
or
2 years old.
Cow: "Mooooove over"
Sheep: "Naaaaaaa."
or