I grew up on Lake Hamilton in Hot Springs, Arkansas. My family always had a boat, and we enjoyed water skiing, jet skiing, fishing, boating, and wakeboarding. The entire family would use the boat; aunts, uncles, cousins, brothers, and parents. Therefore, everyone would dock differently, using various techniques. One would use one knot, and the next person another.  Or, someone would try to manipulate the line so the boat or the dock didn't get damaged. Or, the length of the line might not have been the correct length, and so on and so forth. Oftentimes, a person would stump his/her feet and toes on the cleat. And to compound problems, we might pull up to a restaurant and not be able to find any lines to dock the boat. The whole experience was stressful because the driver would try and dock without damaging the boat or the dock, while the passengers frantically searched for the lines. So, I came up with a retractable boat/dock line to solve all mooring problems.