One thing I couldn't abide by was being called a "son-of-a-bitch"*. I've never fought too many times, but there was twice I had to fight over being called a "son-of-a-bitch". That's beacause it's an insult to my mother. My mother was not a bitch.
The first time I fought, was when I was a small boy. I was 6 or 7 years old This one boy called me that and I knocked him down. Then his sister hit me with her lunch pail.
The second time, I was older and when the son of dad's favorite butcher called me that I hit him so hard that I broke his nose.. The butcher had a hard time facing dad after that. Dad asked me if I knew why, and I told him. I think he understood. I hope he did.