Okay, let's say it cause by promiscuity(i have doubts), let's say the reason why roast beef vagina are made are because of micro-tears cause by big dicks, which wouldn't heal to the previous state, it would create scar tissue inside of the vagina.

But, would it make the vagina a gaping hole? How doesn't it prevent the vagina going tight again? And how would it be visible outside of the vagina? Is there no limit of of scar tissue length? How it's even possible? Because the micro-tears have to be on both sides of the scar tissue in order to lengthen it. Is it that a big dick will flip the scar tissue to it's backside when it's thrust forward which make micro-tears there, and when thrust back, will it pull the tissue using friction which cause micro-tears there?

But how does the vagina heal? Does it cover the tear mostly flat like how a tear on your skin? Or it make a tissue hill that if teared repeatably would make a mountain? And that's didn't even mention vaginal lubricant especially it aroused, which would make micro-tears almost impossible anyway. They only way that vaginal micro-tears happen if intercourse happen in a dry vagina, but that the one penetrating will feel the dryness to, so even he would use lubricant, unless it's rape, but roast beef vaginas would be a sign of a rape victim, not a slut.

"How could labia possibly tell the difference between 1000 dicks once each, and one dick 1000 times?"

that's a good point against people that think roast beef pussy = slut. Because how do you tell a women that have "roast beef pussy" is a slut that have sex with many men vs a passionate women that have sex with her lover? You can't visually.