I kept some longhorns for a friend of mine last year for several months. They were exceedingly friendly. When I carried range cubes in the kubota they would come up and let me pet them. Most bulls are friendly in these days, as breeders want to keep bulls that pose no threat to their owners. I just purchased a registered Black Angus bull for $5,200.00. The fellow that sold him to me stressed how domestic the bull was. Bulls are generally bought from registered herds and their owners handle them with loving care, and consequently, the bulls are very tame. Some cattle, bulls and cows, that have been mishandled can get mean and sometimes sneaky mean. Cattle should be handled with respect, as they are very large, strong animals with the ability to kill and maim quickly.
The bull story is funny, and I can see that happening, but I have test bees and gently as a dog cattle.
When, and if, I have a cow critter that shows any aggressiveness, it goes to the sale barn soon. I sold a cow to a neighbor, after telling him she was very aggressive when with a young calf. She put his butt under a feed trough one day after butting his hip. There was no lasting damage, and he told me, "well you told me so, but she was such a good looking cow that I couldn't pass her up." He too, soon sold her.