This episode of "Ask a Fat Girl" by Tasha Fierce (btw, that's a PDF in that link) is all kinds of right on. When one girls asks how she convinces herself that the person having sex with her doesn't find her disgusting, Tasha replies:
I immediately assume that whoever is having sex with me finds me attractive and I concentrate on feeling good.
It's like I used to tell my friends: "It's not like he thought you looked super skinny in your clothes and then got you home only to find some magical flap of fat he never knew about fell out when you took your clothes off."
9 hours ago