...when your tennis shoes are over 5 years old and still in good condition. Prior to turning about 25 years old, I either grew out of my sneakers or wore them out long before they had a chance of getting old. Since I find sneakers to be too damn ugly for every day usage, I only wear them when I'm engaging in some sort of sporting/excercise activity. I suppose the age and relative condition of my shoes also are a sign that I'm hardly the Mountain Dew poster child I once was either.