Does your dog pull you down the street?
Leash pulling can actually be extremely dangerous. Some people have broken bones, sprained ankles, pulled or torn muscles, have ran little kids over, etc. To some people, it's not just being pulled on the leash, it's much more than that.
Luckily, leash pulling can actually be corrected in about 10 minutes, give or take, depending on other issues the dog may have. Heres a good "how to video on leash training your dog"!