My mother had an orange tabby that tipped the scales at 24 lbs. Solid muscle. Everyone who saw him thought he was a bobcat, if it weren’t for the long tail. I accidentally startled him once and he raked his fangs across the back of my hand. He let go and acted very sheepish when he saw it was me, but it bled like hell and I had a pair of scars there for years afterwards. I’m lucky he was declawed or I’d be typing with a stump.
I believe cats have a greeting and possession issue. My big black male rubs up against me and bites softly to say hello. He will let me rub his ears and grab me if I pull away. Push my hand towards him he’s happy. My little grey tiger rescue project started out wild and a runt in her sibling group. She is demanding and only likes rubbed on the head occasionally any friendly petting is greeted with teeth but she sleeps next to me frequently. I’ve had a variety of cats and dogs, mostly rescues. Each has their own personalities and the separate species attitudes. I’m thankful domestic cats are generally small. If they got too big it wouldn’t be safe to be around them.