Mortified that their inner labia dangled down like a penis, mortified that a giant labia goes along with the assumption that they have a giant, cavernous vagina.
People just get all bent out of shape over the big vagina.
I love the idea that people equate it with being a slut. As though being a slut is a bad thing. The very idea of actually choosing a different vagina also seems hilarious to me. My pal Dr. Stubbs says that although some women have it done for practical reasons, all of his patients say their primary concern is cosmetic. I have only done three labia majora reductions.