Here's the Deal: Don't Touch Me

When you see him on television, Howie Mandel is about as friendly as can be -- and many of us have seen him giving a contestant on "Deal or No Deal" his trademark fist bump. 

Turns out that that fist bump is Mandel's way of coping with a serious case of Obsessive-Compulsive Disorder (OCD). He doesn't shake hands, and he'd prefer never to make physical contact with strangers if he could help it. In his memoir "Here's the Deal: Don't Touch Me," Mandel tells the story of growing up with OCD and coming to terms with the illness as an adult.