ANY excuse is a great excuse! Ha ha, my fingers slipped and typed sexcuse there, for a moment.
Oh wait. I typed it anyway, didn't I? Bah!
It's fun to dress up as someone else for an evening. When you're a lot younger, it's even more fun to get so much candy that you don't know what to do with it all, other than make a great big candy mountain and roll around on top of it, cackling in the midst of a sugar high.
Or your parents could dress up as the earth mother and earth father, and give you the gift of pinecones one year, like ours did, complete with a 'the time of harvest' poem that went on for an hour and a half...before we rebelled and threw our pinecones at them.