Read the Goth Code or alt.gothic.faq if you want to learn more. In my opinion it's the glorification of exotic and sexy. Expanding the limits of fashion with different materials that were never thought of as fashion implements. Each one is a different example of how fetish fashion can be made to suit a personality. We are all not shaped like Catwoman though.
Most fetish clothing is made to be body hugging.
Do not think of this and discard the idea of wearing fetish clothing because you are uncomfortable revealing your body. Instead, use body hugging to flatter your better features. A full bust needs a tighter piece of clothing or lovely legs can be shown off with latex leggings. For men, there is jean-cut leather and pvc pants that will great on any male body shape. For women, a circle skirt can hide hips and waists.