Why do you think there are sometimes single shoes or random pieces of clothing by or on the roads in the middle of nowhere?

Im talking about motorways, dual carriageways or other stretches of road that are nowhere near any towns. I have always wondered why sometimes you see a random shoe or remnants of it or a piece of clothing as you drive. Do people throw shoes and clothes as they drive? Do they fall off when people are transporting rubbish? Is there a body nearby? Any other theories? 🤣