Why do some people call petite girls "fun sized"? And is petite a deal breaker?

Grungenoreos
Definition of petite: (of a woman) having a small and dainty build. Synonyms include but are not excluded to: dainty, small-boned, little, delicate, and small.

I always hated being merely 5'2. At 12 years old I didn't mind it but little did I know I would remain the same height at 17 1/2 years old. Recently a few guys refered to me as "fun sized". Why is that? I don't see the fun in being small which equates to being small all over even though I have a shapely figure. I am not wishing to be 6'0 feet or anything, not that its horrible, but I just wished that I was at least 5'4. Because of my height and my small framed size, I get mistaken for a 14 year old unless one were to notice my face and my 32 C cup breasts first. Is being petite a deal breaker?
Why do some people call petite girls "fun sized"? And is petite a deal breaker?
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