i think it depends on what happened when you grow up,
between 10-15 maybe, when you start loving girls (or maybe men..
)
you have genetic assessments
and you also see the world around you.
i think, like geraldbeau said, it often has something to do with your mother,
if you had one, or similar persons you liked and trusted in.
and you meet many other people
like teachers, girls in school, aunts etc.
i always liked skinny girls.
very aesthetic and not too heavy to bear them!
like a prince who is carrying his princess..
or maybe just her purse...
have a nice day!
with skinny or fat girls, whatever you like...