Skate It Up
Have you ever been on a skateboard? I haven’t, because I’m one of the clumsiest people I know. But I still know generally how they work and that a good push is required from one foot and one foot only. Cue this obvious comparison photo of this person’s skate shoes. You can tell which foot he uses to push the board.

Now, pop quiz: which shoe does the pushing? I’ll give you a hint: it’s the more worn-out one. Wait, did I just give you the answer? Well, you probably didn’t even need me to say anything, as it’s really obvious if you think about it. Skateboarding is hard on your body and on your fashion!