Teehee! Great poll!
I only picked two answers:
"Why not?" The first thing that springs to mind whenever I'm asked this question. Also, the first thing that sprang to mind at the moment I saw the poll listed in the section. *g*
And, "42". Because I couldn't NOT click that.
Other ideas... hmm, you had "Because!" but you didn't have "Because I said so!" Though it's pretty much the same thing, I guess.
"Because life's a b****"/"Because that's life"?
Also, the two most popular Greek answers:
Q: Γιατί; ("Why?")
Α1: Για να ρωτάς εσύ. ("So that you ask." I.e., to make you ask why.)
A2: Γιατί η γάτα έχει ένα αυτί. ("Because the cat has one ear.")
They rhyme.
See ya,
AnnaBtG.