Hell yes! My first time was in Manilla with two Philpina girls, both with pierced tongues. While that was excellent in itself, the double blowjob felt like nothing I had experienced before.... Whether they were lickign balls or cock it was wonderful.
I highly recommend a trip to Manilla or at least the nearest rave!
I wear a tongue piercing and have received alot of compliments from women on it adding a little something extra to the experience (Kimi being a noteable exception). It varies on the size of the gauge and of course how you use it. There are also some cool vibrating piercings that has definitely made an impression.
Right now, I usually wear a classic, slim gold one. I also have a fun one with a yin-yang sign in a green clover that glows on one side, and the playboy bunny on a black background on the other.
How do I know what guys think of getting it? I have no penis! I've visited a lot of penis, though, and I haven't had a single one say to me, "gee, I wish you'd put a whole in your tongue and do that with metal gadgets". I guess they're satisified with the old fashioned model tongue.
I like to put a piece of ice in my mouth right before giving head, then it chills the metal rod in my tongue and he gets the hot & cold sensation. Works for me :) If the master is satisfied then I guess Im doing something right :)