More about biting. How, not why, we bite.
Our teeth are made like slender rapiers that are deep into flesh and stay there for the death bite.They slice into the skin leaving only a small puncture mark but bringing with them infection from the bacteria in our mouth. Dogs teeth are there to slash and tear the flesh and weaken the prey with loss of blood.
So that is why humans often think that cat bites don't matter.
Far fewer feline bites than canine ones are seen at human hospitals but they are far more likely to be infected. Add to that the chance we will scratch as well as bite, and some humans (not many) will get infections from a mere scratch. This is call cat scratch disease.
In both cases the skin near small puncture or the small scratch will feel hot and swollen. The lymph glands near to the injury may swell up too. And if nothing is done about it, servere illness can set in. So, humans, take cat bites seriously.Get medical help. Respect our desire for space. Do not interfere. Stay away or you will regret it!