Unbeknownst to Kowalski, the Leprechaun's spirit travels up his urine stream and into his penis, where his presence manifests as gonorrhea. The marines return to their ship with the injured Zarina, whom they plan to return to her homeworld in order to establish positive diplomatic relations.
Kowalski was unaware that the Leprechaun's spirit had entered his urinary system and taken up residence in his penis, causing gonorrhea. The marines returned to their ship with Zarina, who they planned to send back to her home planet to establish a peaceful relationship.