It takes two. One to change the bulb, and the other to kick the switch.
or
Only two, but the hard part is getting them into the light bulb.
or
I said, "I've been on telly but I'm no Dean Martin".
or
The police had to comb the area.
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She was a Roman (roamin) Catholic
or
Put it in a glass with some ice cream and root beer.
or