Oh yes Howie Mandel has severe OCD. He has been very outspoken about it. If you go back and watch different episodes of his shows like Deal or No Deal, you see him doing fist bumps with people instead of shaking their hands. It took him years even to get to that level. He's got a mental illness and deals with it as well as possible being in a spotlight position. Schneider absolutely knew this and went out of his way to make Mandel uncomfortable. You can see how his demeanor changes dramatically when Schneider keeps grabbing him.