Intending no insensitivity toward serious health issues and their affect on relationships: As Slate.com’s Dear Prudence notes in response to this advice-seeker (scroll down to “Pursue or Quit”): “I don’t think I’ve ever read a better description of kismet than: ‘We both suffer from the same rare intestinal disease.'”

Perhaps, though, they’re just on the “rare” end of an entire spectrum. As our tipster notes, “It’s very hard for me to distinguish between infatuation and indigestion.”