Yet another reference to infinity

P.289:

"...(Orin) had already drawn idle little sideways 8's on the postcoital flanks of a dozen B.U. coeds."

Dfw has done this several times already (though it's the first time I'm handblogging it) and I'm wondering if the "infinite/y" references are going anywhere besides the obvious reference to the book's title and/or Yorrick.