In my time spent living life as a fat girl, I have found that both men and women alike seem to be under the impression that fat girls are desperate. Desperate for friendships, for romances, for attention, for sex, etc. That, since we're fat, and people don't like fat, fat girls are desperate, and should take what they can get.
How shitty is that? I'm the furthest thing from desperate. I'd rather spend my time alone then go off desperately seeking attention or companionship.
Fat girls are seen as easy targets, or, an easy lay, if you will. I guess because we're fat, people assume no one loves us, and if they offer, we'll accept. I'm not saying this is the case for everyone, as I've seen big girls who get a little attention when they desperately seek it. But some of us have a higher level of self-respect.