What are the "Empty Nest" rules?

I remember a movie not long ago........ "Sometimes they come back"..... I'ma tad worried, think it's gonna happen. Why ain't I excited? Why ain't I happy? Why do I feel like my "teaching" days are over? Call me rotten, but you'd haveta see the view from my shoes to mebbe understand. I ain't excited over this. Someone shoot me something drippy/sappy to turn this attitude around! Love, Victurd.