"Slut shaming - An unfortunate phenomenon in which people degrade or mock a woman because she enjoys having sex, has sex a lot, or may even just be rumored to participate in sexual activity. Often it's accompanied by urban legends such as the common virgin misconception that the vagina becomes larger or looser with use-- in fact, sex has no effect on vaginal size." from urban dictionary.
if that were the case, every woman would be as tight as they were when they were virgins.