In my opinion, when you pet, then treat them as a part of family rather than considering it just an animal. It is important to take care and help in their growth, a little careless may lead to unwanted consequences like aggressiveness or dullness.
None of us are here forever, so we should probably think about how we treat each other also.
This is an important lesson. People often miss out on this on each other. They are getting more into animal instinct than being a good human...Good to see the little pet mingling along nicely there.
Some people train their dogs to be aggressive, and then terrible things happen. Some of the dog breeds should be banned, as they are potential weapons.
Rottweiler / pit-bull I know...already seen their aggressive behavior...they are in their genes...hard to take away..they are silent predator. People pet them for status...but they lead adverse consequences. Already heard of many news