I remember when I was about 14, a boy told me I "had no neck". Well, I don't have a swan-like neck, granted, but this comment has never left me.
I also remember being v. proud of a new perm that I'd had (about 15/16) and was going out to a local disco with my cousin. There was a boy who lived near her who I quite liked, he was really nice and friendly, and I remember asking him if he liked my hair, and he said "yeh, it's alright at the front but the back is a right mess". Never forgotten that either.
Or the time that a girl I worked with said "xxx's eyebrows are like coat-hangers". Never forgotten that bitch either.
I'm sure there are more hurtful comments from years past that I will never forget. How about any of you?