Mebby...
I don't know. I DO know that it's pretty common place in certain cultural sub-sets. And the chicks hate it, but hey....you can't get pregnant :(
Don't ask how I came across this thread...
Just wanted to point out that not ALL women hate it...in fact some like it, for whatever that's worth.
Just for the record I know this because I talk to a LOT of women, (many of whom are way too open about their sex lives to strangers)...not because I've "been with" them.