I was diagnosed with attention deficit hyperactivity disorder (ADD/ADHD) and obsessive-compulsive disorder (OCD) as an adult, but I don't remember a time when I didn't have them. Back in the 1960s, when I was growing up, my symptoms didn't have a name, and you didn't go to the doctor to find out.

I'm always in a hotel room, and I spend a good portion of my day setting it up so it's comfortable for me. Whether that means making paths out of towels so I don't touch the carpet or removing the comforters or just not touching things. Even sitting on a plane with a bunch of other people - it's really hard for me.

I once called construction companies to bid on an addition to the school library so that there would suddenly be people outside, measuring the building. 'Who authorized this?' the principal would ask. The answer: 'Howie Mandel.'

I once missed an appointment because I left my house, I locked the door. And then I thought, like anybody else, you know, 'I don't think I locked the door.' I just kept going back to the door. And I couldn't stop myself from checking and checking.

Comedy may be big business but it isn't pretty.

I have gotten a couple of letters meant for Mr. Bean aka Rowan Atkinson. These letters would say things like, 'You're so funny, you make me laugh, with your big rubbery face,' and I would say, 'You can't mean me!'

I wanted people to know that my grandmother was the reason why I did comedy in the first place. She pushed me to really get out there and pursue my dreams.

I started being a comedy fan when I was, I'm going to guess, like 5 or 6 years old.