That "wait until you get older thing" is hilarious.  Someone pulled that on me not long ago, saying that I would gain weight by the time I got to her age.  I innocently asked her how old she was, already knowing what to expect.  Sure enough, the cow was almost 10 years younger than me.  I told her how old I was then watched in glee as she sputtered and stomped off. This has happened several times now.  It never gets old.