Or so says the tons of research done by folks in the psychoneuroimmunology area, and I believe them. Learning takes place when you need to know, so goofing off around the playground will lead you to what you need to know, when you need to know it. Believe it or not that's all that matters. Yup that's what we said, by playing around here, on your own time, at your leisure, you can train yourself. Have a sense of humor about all this.
Laughter is universal.
It crosses age, culture and gender and has always been considered good for us. But there is new evidence that laughter is much more than this. It leads to the playfulness of childhood and begins our interaction with the world around us. We need laughter play joy in our lives because those are those types of creatures that we are. We have powerful systems that allow us to live in the world in a certain way and if we build social structures where these are not permitted and encouraged, we won't feel well.