Why would you hit your dog in the nose? If they are chewing on furnature it's boredom and or separatation anxiety. Just give them a bone or Kong to chew on everytime you catch him. Then just spray your furnature down with apple cider vinegar. If your dog lunges at anything for any reason you don't have control of him. Positive only is simply not using shock or prong collars, not hitting them for any reason, not rubbing their nose in mess spots(they have no idea wtf you're doing when you do that anyway) not doing the stupid ceaser Milan side kick to "distract them" all that shit does is make a dog aggressive. Since 90% of people don't know what they are doing and just want to be "dominant" and be "alpha" and just make an aggressive dog and look like a complete bafoon. Unless you're training a military level personal protection dog you don't need any of those things.
Now if you need to nudge a dog or grab their collar to move them you can, as long as you're not hitting or hanging them to do so. I've trained all my dogs and had proper training, including when I was in the army. I never had to use anything like that. The only caviat to that is during a dog fight. I prefer a bite stick or just the wheelbarrow method(which I usually use) all that you have to do a dominance roll and show dominance and be the alpha you need to show them who's boss is so stupid it drives me crazy, let alone has been disproven tremendously.
All dogs are like small children. Do you beat the shit out of them if do something they don't understand that's wrong until they obey out of paralyzing terror? Or do you teach them what you want and praise them when they finally get it? It's literally that simple.
Well I did train at a high level of protection so I did need those compulsive measures in the past. I don't now. I put away the prong collar because I don't need it to teach my house pet precise heeling and obedience anymore. He just needs enough training to be a good pet, and anyone with half a brain can train positively at that level. However, if he's going after a Cain Toad I draw the line. I'm not going to go back into the house, open up my bag of treats and offer it to him to come in!! I'm going to do whatever it takes to get him away from that poisonous toad because I don't want a dead dog.
BTW You don't come in here suggesting that anyone beats the sh## out of dogs when you don't even know them! There's also such a thing as tough love. I had a gf who never ever disciplined her son, and I couldn't stand visiting her house because he was such a spoiled brat! You can easily go wrong by being too weak in discipline also. My AB was the dog who got the most corrections because I trained him at the highest level, but he performed because he did it for me! Ask anyone who trains a dog for weight pull what's the most important trait in a weight puller. It's not necessarily strength that wins, it's the desire to please your owner. He beat an IWPA Gold Medalist in one of those competitions. He could have easily given it a good try and stopped, but he reached in and gave it that 110 pct to win. That dog would do anything for me, and you don't get that by beating a dog unnecessarily and losing his trust!