Seven. One to change it and the other six to sing about how good the old one was.
or
It takes them a long time to swallow their pride.
or
Take regular water and just boil the hell out of it.
or
Because he traveled a lot.
or
2 years old.
Cow: "Mooooove over"
Sheep: "Naaaaaaa."
or
In sundae school.
or