I had a phall once, after consumption of beer damaged my judgement. The commentator in Azagoth's link is right though: it starts OK, but then just gets hotter and hotter. Capsaicin is fat-soluble, but not water-soluble, so beer will have no effect, but naans or raitas will help. I wimped out about 90% of the way through.
Uriel is also correct: it depends a lot where you eat one (and many places don't even offer them). If your curry house specialises in the Friday night "I can eat a hotter curry than you" crowd then it will be like eating napalm laced with sulphuric acid. If the restaurant tends towards the gourmet end you might survive.
And keep your toilet paper in the fridge, because it hurts nearly as much when it comes out again the next morning.
M