God says "No"?????

So I was watching the Graham Norton Show the other night and rapper/actor/whatever 50 Cent was one of his guests.  I was about turn turn it off (just my instinctive reaction to rappers) but I happened to hear Mr. Cent talking about his childhood.  His mom was 15 when he was born.  He was born in the midst of urban blight (my words, not his), and he somehow left the world of inner city drug dealing behind.  So he is actually a success story (not to mention that he evidently had bought into the Vitamin Water company (huh, there is a picture of Mr. Cent right on their homepage) pretty early and made a handy profit when it was bought by Pepsico, to the tune of $100M or so according to Mr. Norton).  I was evidently just a day late in being able to hear this conversation again on Mr. Norton's show's webpage, as they removed the video replay of it just today, unfortunately.  But at some point in the conversation the talk turned briefly to praying, or something like that.  Now I'm not much into praying ... pause while my wife laughs her head off ... OK ... but Mr. Cent said something that I thought was actually kinda profound.  He said (I can't quote it exactly, as I missed the on-line replay, but this is close enough):

"If you pray to God and he don't answer you, then his answer is No."

I thought, surprisingly, that this appeared to actually have some merit.  It seems reasonable.

So does anyone get an answer when they pray?  (There's something I'd like to see)  And, assuming not, why do all of these silly people keep praying?