Seems like it would help keep the shorts from getting stinky.
Edit 1: friction is the answer
Edit 2: sorry for this edit – i was trying to make a new post, but Blorp for some reason took me to editing this one instead. Trying to put it back the way it was…


Friction. For extremely long rides (100+ miles), you want the least amount of friction for the least amount of chafing. I use chamois butter in my shorts too to cut it down even more.