”It all comes back” sounds like he means the stench, rather than any bleaching. (And also like the worst Stephen King story ever.) You can see why they wouldn’t want to take along anything as cumbersome and bulky as a change of underwear on a road trip though.actually vaginal ph has a 'bleaching' effect on black/dark underwear. it is normal. if you don't want your underwear to be slowly bleached over time you should wear light coloured lingerie or daily pantyliners. what i don't buy, is that the 'neovagina' has the same sort of natural secretions as a uterus. there's no way that anything coming out of our salamander is anything close to that.
what is really gross, is wearing the same pair of underwear for like four days. even on a road trip, that is unconscionably disgusting. have some self respect, take some spare sets with you or fucking wash for once in your rotten little life.