Halloween and Laziness

Why is it that every time October 31st rolls around, I can never muster the strength to get my lazy ass off the couch to put a costume together and go out for the holiday?  My friends have long ago stopped calling to invite me to parties cause they know I won't be there and if I did show up, I'd be dressed as usual, jeans and a t-shirt, or something boring like that.  All the while giving the excuse that I was too busy to make a costume.  Bullshit.  I'm lazy and that's all there is to it.  The last couple of times I've dressed up, I had a blast, but I had a girlfriend and that made it all the more fun.  This year, I'm staying home.  Again.