Been there, done that (as a dub). I wasn't really celebrating my birthday...rather I was celebrating turning 21. Big difference, right?!
And in case you don't already know...it is extremely common for Witnesses to celebrate their 21st birthday by going to bars and getting wasted...except they don't call it "celebrating their birthday." Because that would make it so much worse...
I'm not going to pick on this kid. But statements such as his tell us a lot about the WT/JW religion. Young Witnesses are led to believe that going out and getting hammered is less bad than blowing out candles on a cake.