What kind of grossness is this
I think it’s a six-spotted fishing spider, Dolomedes triton. They don’t just futilely hunt fish in your bathroom, they eat insects too. It would be an unpleasant gross surprise in the bathroom – except to people like us regular users of this forum. It would be a happy surprise for me. I’m a really low-maintenance/ cheap date kind of person. Your spider visitor can be escorted into a container and be given a one way ticket to someplace with water, like the edge of a brook.