Two, one to call the electrician, and one to mix the drinks.
or
Stop! You're under a vest.
or
The League of Extraordinary Con Men.
or
The question is irrelevant, since you couldn't find the dolls even if you knew how many. (Note: Well, this was a good joke in 1983-84. . . .)
or
they never get old!
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In their Sleevies!
or