A few years back when you lived in an apartment with your dog, your dog went missing and a weird little creature showed up, it looked like a worm with little arms, it grew on you a bit and it seemed to like you. You went on feeding it and caring for it, and now it's big, about to your knees and it grew legs and a long boney tail. Little did you know, it was an alien lifeform slash parasite thing that bursted out of your dog and killed it. At least it likes you I guess. Dont forget its name either.

You're sitting on your couch with your "dog", who is sleeping half on you and half on the couch pillows.