Here's the story behind the punchline.
I bumped into a female Taiwanese colleague in the elevator at work the other day. It seemed early and she looked like she was leaving so I asked her where she was going. She said home.
"Oh, to do what?," I asked.
"To change a lightbulb," she said.
"Why not later after work?," I decided to ask.
"Because a plumber is coming over to change it for me," she said matter-of-factly.
"Ok, can't you change the bulb yourself? I mean it's easy," I questioned.
"(Oh you silly foreigner) I'm a Taiwanese girl," she replied.
Yes, you certainly are, I thought.
Turns out that she didn't know anything about switching off breakers or electricity I guess and was willing to pay to have someone do a simple thing like this. This can happen in Taiwan where the girls often really play the part.
So to repeat from the beginning:
How many Taiwanese does it take to screw in a lightbulb?
Evidently, in a Taiwanese girl's case, it might mean at least two...