To be perfectly honest.
For me as a male, I do Not see in the slightest any type of problem with women having their vaginal discharge.
I fully accept that as I am Not the one whom has it, I will not see it anywhere near the same as women that do have it, & have zero choice in having it, however saying that...
I don't find a problem with it in the slightest, so what if it's caught in her knickers, it's perfectly natural for women to have it, it's beyond their control, whether they like it or not, or anyone else does.
You can't blame them for having to have it, nor should you even remotely try to make them feel bad, disgusting or anything else for having to have it.
Speaking personally I don't have a problem with women having it in the slightest. I've seen women's soiled knickers multiple times over the years.
I've even managed to pick up that most women would rather a guy see their period than their discharge.
Personally I'm not that bothered about seeing either myself, yes neither of them may be very pleasant to see, especially for some/most, but women simply can't help it, she is still a woman, still the woman you want, like, adore, love, put on a pedestal, worship, adore etc etc... .... & just because some may be willing to accept the lady fully, natural bodily functions & all, maybe even ( if only for some ) not let it bother them or even see how amazing her body is & its natural functions & be willing to accept them, maybe for some even find it anything from endearing, to making them feel truly special because perhaps she let's him see herself in her natural way, perhaps even for some find it enjoyable in some shape, way or form, or even find it a turn on....
... so what, it's clearly never going to be for everyone, but nothing ever will be, as long as those whom do like it, enjoy it are consenting adults & are alright with it between themselves, surely that is all that really matters?!
Each to their own I say.
If women didn't like sex no guy would Ever get a shag!!