This is why I do not run. I could run 20 miles per week, but would eventually end up screwing up my knees and other joints. Arthritis will eventually set-in and I would end up decrepid and crippled, relegated to the couch eating cheese-puffs and bon bons.
This is why I have decided to skip to the inevitable end at age 30. By not exercising and taking my place on that couch with my healthy joints, cheese puffs, and bon bons I will avoid the pain and enjoy myself. And beer will take the place of those fun little endorphins you runners keep talking about.