this is a very common behavior for 2's. i think it is the focus on them and the noise (sorry, but by a 2's perspective a lot of people singing out of tune is frightening. add to that you include his name, and have fire.) it's all new to him. he certainly doesn't remember turning 1. with reassurance he'll grow up to enjoy birthdays like the rest of us, until he's 30 and doesn't want to celebrate any more. next year will be so much better and when he's 4 he'll be all about the birthday! happy birthday to him! my dgd will be 2 on august 3rd. let the fun continue!