Yeah, his cat is normal. Your cats were just retarded. Sorry you had to find out this way.
Roommate's cat: <meow> "I've decided that we should keep that door to the refrigerator kept open."
Falco: <meOW> "What?"
Roommate's cat: <meow> "That door by the big box."
Falco: <meOW> "What?"
Roommate's cat: <meow> "That door by the thing in the kitchen that feels cold when you open it but is warm down by the vents underneath... I think we should keep that open."
Falco: <MEEow> "Why?"
Roommate's cat: <meow> "Well I haven't decided if I want to go in or out yet. Plus there's tuna in there sometimes. It's pretty much a win-win keeping it open."
Falco: <ME-OWWWW> "Whhaaaaaaaat"
Roommate's cat: <meow> "Look, I just want the door to the refrigerator open more often!"
Falco: <RRR-OWWWWW> No.
Roommate's cat: <meow> "WTF?! Why not??"
Falco: <MEOW-OW-OW> "I'm fucking high on catnip."
Roommate's cat: <meow> "I don't know why I bother talking to you."
Falco: <MERRRR-OWN> "I want to sex your lady parts!"
Roommate's cat: <meow> "I'm a tomcat you fucking moron chimp. How did your species ever advance??"
Falco: <MER-OWN-OWN-ME-AH-OHHHHH> "I'm in heat. Come chase me and make me feel sexy!"
Roommate's cat: <...> "Riiiiiight. I'm done."
*walks away, takes a shit and sits under the sofa for three hours*
(Edited 1 minute later.)