Howie Mendel
OCD
You know him on "America's Got Talent"
Howie is one of the Judges that have OCD where he have a fear of germs that affected his life resulting to never shake anyone's hands with his bare hand and even shaking off his head hair to make him feel more clean.
One time only
On May of 2015, A certain hypnotist by the name of Chris Jones came on and Howie was the volunteer for the hypnotist act. Chris hypnotize Howie into thinking he had gloves on his hands. Chris then ask Howie to shake his hands while Howie being in the influence of "wearing gloves", after that Howie began shaking each of the 3 judges' hands that surprised them as this is the first and only time that Howie Mandel shook with his bare hands (without using hand sanitizer).
The act itself
Chris Jones
The hypnotist
The act with him and howie
Shaking hands, Woah man
Howie and the judges
At least Howie thought he was wearing gloves
Chris Jones: Howie Mandel Gets Hypnotized to Shake Hands - America's Got Talent 2015