Unfortunately strawpage did NOT work, it still shows empty there...

But ooh, this is a very good concept... navel vore is something I should consider more often.

The potential for accidental vore is IMMENSE. Wearing his navel-exposing casual accident and just walking right into someone, and they end up getting slurped up... By the time Astolfo realizes what's happened, they're in too deep and there's no saving them, they just need to ride it out.