To get to the udder side.
or
Fryday
or
Drinking, bathing, washing, swimming, etc.
or
Twenty. One to hold the bulb, two to turn the ladder, and 17 to be on the guest list.
or
Accountants know they're boring.
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The Bunsen burner replied, "It's just a phase you're going through."
or
A swordfish
or
Three, One to climb the ladder. One to shake it. And one to sue the ladder company.
or