I needed 3 googles to understand the etymology. But seriously, why is ask being nounified where other verbs are not. I think it has something to do with the culture, but I cannot place my finger on it.
http://itre.cis.upenn.edu/~myl/languagelog/archives/001331.h...
http://english.stackexchange.com/questions/4246/can-or-shoul...
Nouning verbs (like verbing nouns) is very common in English, to the extent it's often unclear which came first.
"Ask" as a noun, however, I hear all the time...and not from bankers or New Yorkers. It's very common in Bay Area tech.