as midnight crested through the starlit skies above , the oneirophage expelled the candiru from his tattooed penises , the replicas of satan and serpent which covered them expectorating the slender parasites from their mouths while the constrictress performed fellacio upon him , her boa constrictor jaws unhinging to encompass his genitalia the same way they would to swallow a large piece of prey , so that they could accommodate the oneirophage 's twin phalluses simultaneously .