Vaginas are a beautiful thing. They're soft, wet, warm, and inviting, and yet they come in as many models as there are cars on the road. Some even have a vagina preference. While many men like an outward protruding labia, others get off on vaginas totally concealed by the outer lips.
I was at a swingers party once where all the girls were standing around in their panties. Most were wearing thongs or frilly panties, but one wore large cotton underwear. I playfully teased her, asking, "Why are you wearing granny panties?"
"I'm an outie," she said. "I have to protect my precious parts."
(pic below the jump NSFW)