FFK & Optimus Prime need your help! (with video & pics)

[Fast Food Knight]

OK, so about 6 months ago we adopted a 3 year old male cat from the Humane Society. Named him Optimus Prime. He is awesome. Almost acts like a dog... follows you around... meows and runs to the door when you get home... freaking badass (some 2+2ers can attest to this). We have never had any behavior problems from Optimus whatsoever.

Here is Optimus



Balancing act...


And my personal fave of Optimus and AEKDBet...



Here is a video of him.

And so my dilemma...
Over MLK all three of us were out of town for several days. We have left Optimus by himself with lots of extra food and water for up to six days before and he was fine, so I did not think this was a big deal.

Buuut while we were gone this time, he peed on the couch. Awesome. It took a little while for us to catch on to exactly what was going on but by now, he is peeing on the couch in the same spot whenever he is alone.

I love my cat dearly... he has been a joy in my life through some really hard times recently. But, I can't keep living with a wet/smelly/uriney couch.

My question to you OOT, is this: have any of you run into this problem before and had a successful resolution? What products should I use or not use on the couch? What sort of training can I do to teach Optimus not to pee there anymore?

He is neutered and I don't believe this to be a "spraying" type thing, based on the research I've done, he smells the pee spot and thinks he's supposed to pee there. I really don't want to lose my cat so please help us, OOT.

Responses like "get rid of your cat" or "cats R gay" are not funny and will be ignored. Thanks.