Shoe Change
When you wear the same shoes all the time , it’s easy to see. Most people look at their shoes for the first signs of wear. If you work outside, you might see traces of how you do your job in other places. The shorts this person wore let their legs get tan over time. But the shoes they wore every day kept their feet from tanning as evenly. So, their tan lines were different.
Talking about something cool
At first glance, you might think this person’s sunburn has an odd shape because they spilled sunscreen on their arm. In reality, this is just a natural tan line! The person who posted the photo said that this happened to them every time they got a sunburn or tan. This part of their arm would not react the same way.