Black Pinworms??

Hi Guys-

I am getting an itching sensation in butt and vagina area. I think it is pinworms. But when I wipe that area when itches I see black threads that look like hair (but I know it is not my hair). Sometimes they are straight and sometimes they are squiggly. They do not move for the most part. I saw one that just flopped but I think when I wipe I kill them? Anyways, what are they? Are they Pinworms? I thought all Pinworms are white??

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