When a guy is nice to a fat (or ugly) chick who is usually ignored or unliked by other guy. The fat chick
sees it as the guy liking her and is immediately infatuated with him.
Applies to other situations where someone is ignored, is given attention and then falls in love with the person giving them attention.
Bill: Hey, hows it going?
Fat chick (in head): OMG! He's speaking to me! He must like me! And he's so hot too! I love him!
Bill (in head): Shit! I shouldn't have said anything, I think she's experiencing the fat chick love effect.