I read somewhere that those of us who still think poop and farts are funny need regression therapy. We're stuck in the toddler stage. Sorry, I still think poop and farts are funny, and I think Roach's book is hilarious! (Don't skip the footnotes!) But she doesn't cover just the nether region. For instance, I learned some absolutely fascinating things about spit.
Like all of Roach's books, Gulp is as much about human beings as it is about human bodies.