Use a sea saw.
or
Because he wanted sweet dreams.
or
One's a spineless, poisonous blob. The other is a form of sea life.
or
When it came time to pay, the skunk didn't have a scent, the deer didn't have a buck so they put the meal on the duck's bill.
or
One's a spineless, poisonous blob. The other is a form of sea life.
or
I said, "I've been on telly but I'm no Dean Martin".
or