I just don't get it.
I was walking my dogs the other evening when I saw someone down the road also walking her two dogs. While I was watching her I was hearing whirr, click, whirr, click, click, whirr and so on. She was using retractible leashes for both dogs.
Now, both of the dogs were small and neither of them were "pullers" but I still heard the whirr (let the line out) Click ( lock it = that's far enough) , Click ( unlock), whirr (out goes the line again), click, whirr, click... You get the idea. And let me tell you, she had it down.
Meanwhile, I've got both of my dogs regular leashes in one hand, my hands staying nice and warm in my pockets, free to come out to give the pups a treat for walking with me and paying attention to me with no effort what so ever.
All I could think of while I was watching her was "Why? Why would you want to make a nice relaxing activity like walking with your dogs into something that requires so much thinking and good mechanical skills?"