We all know how to laugh!
All across the world, in every culture, very young children laugh naturally - for no reason at all. Yes, there are serious situations that require action, and this is not about denial. However, dealing with the egoic mind and psychopathology can be faciliated by side-stepping the mind. During these laughter sessions, no one speaks out loud and natural laughter occurs.
Although our background may have driven us to taking life, and ourselves, very seriously, the innate ability to laugh has not been eradicated.