Though I’ve always been fairly religious, I don’t exactly look the
part, what with pink highlights in my hair, black nail polish, and a
pierced nipple. I couldn’t imagine how a mikvah lady would respond to
my body, and found myself worrying obsessively that I would be called
fat.

This reminded me of something I'd read in Zeek:

Hearing Beneath the Surface: Crossing Gender Boundaries at the ARI Mikveh 

It's quite a different perspective, but possibly one of interest.