I asked "Which one are you then?"
...I finally caved.
I was once staying at a hotel which had two lifts, one for the bottom half and one for the top. I was intrigued with the system and asked the manager about it, his response was a fairly terse one "no funny business here, take the lift like anyone else would" he said strictly.
During my stay I needed to get to the higher section of the building, leading me to use the top lift. However when I came to move it, it took quite the effort and persuasion to get it to shift. Once I'd fiddled around and pushed a few more buttons it slowly made it's way up.
It was at this point I realised the manager simply had a stiff upper lift.
-"What's tiny, green, lives one meter below ground and eats rocks?" -"...." -"The tiny green rock eater of course!"
Shortly after follow up with:
-"If you drill a hole through the entire earth and drop a rock into it, how far does it fall?" -"......." -"One meter, then the tiny green rock eater eats it!"
Maybe I should clarify that I am of the male persuasion.