I had lunch with a friend a while back and we both ordered burgers and fries. While we were eating I noticed he was putting his fries on the burger and I asked him why. He simply responded, "Because it makes the burger taste better." I tried it with mine and I felt that it made no difference. So as much as I thought it was pointless I see other people do it and I'm wondering if it's just a common thing, or an acquired taste.