The woman I am with right now falls into this category, if indeed it is acceptable to categorize anyone! She has always been a big lady, and my affection for her is truly unconditional. There is a societal trend that causes people to lean towards the Christie Brinkley sort, or (heaven's forfend) the Calista Flockhart look!
Our sexual relationship isn't lacking in the least. Her zeal, and mine, are born of a mutual respect, as well as our true affection for each other. Usually the people who are opposed to the pleasure that a relationship with a 'Big Girl' can hold, are the folks who, trough whatever irrational bias they may have, haven't given the opportunity a chance !