Hey jong
Don't worry about those guys being overly sensetive. There really was nothing wrong with that joke. It was easily seen as a joke. But hey with that kind of sensetivity, I'll bet their chi sau is the best!!!!
"I don't know if anyone is known with the art of "sitting on your couch" here, but in my eyes it is also to be a martial art.
It is the art of avoiding dangerous situations. It helps you to avoid a dangerous situation by not actually being there. So lets say there is a dangerous situation going on somewhere other than your couch. You are safely seated on your couch so you have in a nutshell "difused" the situation."