I've seen an un-docked tail and I'm sorry but it makes them look (conformation wise) better if they are "Docked"......I've seen them as Babies and the look like little rats. IMO a docked tail makes their overall body outline seem more compact, hygiene (thank goodness for "Sanitary shaves")
I cannot imagine having to clean them every time after they go to the bathroom with a Baby wipe? No thanks
Besides I'm a "Purist".....I want my Babies to look as close to the AKC. Standard as possible and I happen to love all their characteristic little personality traits that took a few hundred years to Breed?
OK. I looked it up in all of my books, they don't mention a reason other than for "Looks", now I'm curious to see what the answer is now?