The mission was clear to Kz'Flibr'fitz of Johtiz V. He was to infiltrate a domicile with several natives to planet Brax'x III, live among them, learn from them, and report back with a bi-rotation report. This was the simple and clear whole of the mission. The muddled, un-understandable part was how different each of his new 'room mates', as they were called, acted. If Kz'Flibr'fitz, now known as Jack, didn't know any better, he'd say that he lived with three other alien species also disguised as humans, trying to complete the same mission as he was.
Their missions were clear to all of them: Zzziz of Rygyl IV, Krop of Lump, and <sound of a wet balloon falling down a well into dry pudding> of <the sound it makes when you pick up an orange too softly and drop it onto thick carpet>. The unclear section to all of them was how strangly their living companions acted. Secretly, they all felt that something was amiss.
Zzziz, now called Matt, believed that he had been unlucky enough, through intense displeasure of the Luck God Feeeeellum, to find himself housed with humans who were all under the effects of a Mytrubian Stupidity Curse, or worse, were totally normal humans. Matt's culture was investigating the Earthlings as a possible alliance to help them fight the viscious Lumpians in a drawn-out war.
Krop of Lump, now referred to as Pete, thought that perhaps the poor humans had not been smashed in the head enough during childhood to properly inflame their gross, wet brains. His mission was to find intelligent negotiators to help with the Rygylat Empire's senseless war against the noble Lump race.
The one now calling itself Myow, after a delightful sound it heard a small food creature make, only understood that it had found a perfect example of how insane the people of this planet were, and would report back often that immediate destruction was required. Myow's request would constantly be postponed, as it turns out that three other species were using the planet for similar research, and destruction would not be allowed until the others' mission was complete. Meow would have to bide it's time until these mysterious other creatures finshed whatever work it was they were doing, somewhere on this small ugly rock.
They have been living together for exactly one Earth month now, and for the first time in that month, there was a knock on the door. 
Myow almost blottzed herself. She had learned a week after taking a body, that there were two different sexes on this planet, both half of the reproductive cycle. She had chosen incorrectly which was the dominant one, or rather, which was to be belived to be the dominant one. It was obvious to Myow that she could use her chest sacs to control the other sex and that with three male roommates, she should obviously be in charge. Learning how humans live from almost exclusivly them had been a terrible mistake, but she was certain that blottzing onesself was not the way to regain control over feeble human minds, so she kept it inside her own weak body with a cough.