Every mid-October my wife brings home one or two bags of fun-size assorted candy bars--it never fails. Even though she insists it is for the trick or treaters on the 31st we go through them well before Halloween. It really annoys me, but that doesn't stop me from digging in as much as she does.
I found this website to be very informative. There really isn't anything fun in fun size--especially when ripping through five or six of them while reading a book or watching TV. Read it and weep:
What 100 calories of your favorite Halloween candy actually looks like.