I was thinking of this the other day. How do you distinguish between something which is funny and something lame? Does it depend on different people or different moods you have?
And, what constitutes as being funny?
Now getting more biological, what are the processes that make you laugh? What do all funny things have in common that cause you to, in extreme circumstances, spit coffee all over your monitor? Also, what is the evolutionary purpose of humor or laughter?