We're humans, not manekins, it's normal that we wear panties, and that the outline of it sometimes show. It's normal that the outline digs in to out buttcheeks and that it could be visible if we're wearing some tight dress or skirt. I don't see what the big deal is. Bra lines are visible all the time and I don't see anyone sweating or creating underwear to prevent them from being visible...
As long as the girl isn't, like, wearing a black panty under a thin white dress, the VPL doesn't make her look like a slut or whatever. It just means that she's human who wears panties.
Girls, do you care if your panty lines are showing?
Guys, what do you think about visible panty lines? Do they bother you or do you not care at all?