Laughter may or may not activate the endorphins or enhance respiration, as some medical researchers contend. What seems clear, however, is that laughter is an antidote to apprehension and panic.
People hate it when they're tickled because laughter is not pleasant, if it goes on too long. I think it's a desperate sort of convulsion in desperate circumstances, which helps a little.
It is bad to suppress laughter. It goes back down and spreads to your hips.
Laughter is more than just a pleasurable activity...When people laugh together, they tend to talk and touch more and to make eye contact more frequently.
If you make people laugh too much, their blood becomes - I believe it is acidic as opposed to alkaline. It changes the oxygen level in the blood, and people are likelier to pass out at that point.
The act of laughing releases some nice chemical into your brain, you feel good and it's free.
Laughter brightens the eye, increases the perspiration, expands the chest, forces the poisoned air from the least-used cells, and tends to restore that exquisite poise or balance which we call health.