"It took me a long time to realize that my partners were having sex with me in part because of the way my body looks, not in spite of the way my body looks. It sounds simple, I know, but when you spend your whole life being told that fat bodies are not sexy, it takes some time to realize that sexiness isn’t that simple. This understanding is not something that happens overnight for most of us. Hell, it can take years. But, the sooner you learn (yes, learn) to feel sexy just the way you are, the sooner you’ll be able to enjoy your sexuality more fully.
Really, this goes for men and women of all sizes, not just fat women. You owe it to yourself and your partner to trust that he or she really desires you and to do the best you can to keep that in mind when you find you have a hard time letting go and really being seen during sex."
Fat Sex: What Everyone Wants to Know but is Afraid to Ask