Part of the physical aspect of sex is to feel good about yourself. While most people continually work on their weight and body shape, you still need to pamper yourself physically to really enjoy sex.
Pampering yourself starts with making yourself feel sexy. For women, this can include taking a long, luxurious scented bath. Often this includes candles, a glass of wine and perhaps some romantic music. You may also want to consider a pedicure and manicure, a trip to the spa once or twice a month, and perhaps a facial on a regular basis.