Depending on how hard you're pulling, if it was Marlowe he'd probably lay down and ask you do it some more rather than heeling. He loves having his ears pulled. Conrad would definately issue you a little correction of his own for being so impolite as to mess with his ears like that.
I used to train with collar corrections in a pretty mild style, but I still wouldn't do it anymore. I wasn't hanging or beating or drowining my dogs, but I also wasn't accomplishing much and my first dog paid for it with his life. Nothing poisons a good reliable recall like mistrust of the handler and my first dog, my husband's heart dog, was hit by a car because of his chronic lack of a good recall. I blame myself entirely for that--not because I was the one who was butter-fingered about transferring him from his tie-out to his leash, but because I tried to train him in a way that taught him that I was unpredictable, sometimes a little scary, and that bounding around and running away from me when called was a lot more fun than the inevitable yelling he'd recieve when he finally did arrive. He learned very well that when he was on the long line, he'd better answer to "HERE!" or he'd get yanked by the neck, but off the long line, what reason would there be for him to come when called? He was a big, fast dog, a GSD x akita, there was no way I could actually physically catch him if he did not want to be caught. And more often than not, he did not want to be caught.
When I see people yanking their dogs around by choke chains, I want to stop and sit them down and tell them that story. And also that it took me literally years after that happened to change the way I was doing things and to please not make that same mistake.