I talk to people who can't understand why I spend exorbitant amounts of money on my Harley or jump on it and ride for hours ever chance I get, only to end up ri

I talk to people who can't understand why I spend exorbitant amounts of money on my Harley or jump on it and ride for hours ever chance I get, only to end up right back at home, where I started. My girlfriend doesn't understand why I spend so much time in my office typing white letters into a big black box. I don't understand why some people spend large amounts of their {money,free time} collecting stamps or coins or playing golf. To me, all of these things are boring as hell. In each of these cases, however, there's no need to (have to) explain why. Any answer (including "because it makes me happy" or "because I want to") is completely valid and acceptable.