Weak Spots:
~ As I said before; the tail is SUPER sensitive, both physically AND sexually. Remember; Rubbing their tail is like running another's man/womanhood. And remember that it also carries their nine lives
~ Scratching behind their ears will make them forget the world around them and basically pull them into a world of pleasure and happiness (AND RAINBOWS FOR ANY GAY NEKOS :3 ❤💛💚💙💜). And there's even a special spot behind the ears that will make them go limp and fall asleep instantly if you scratch it just about right.
~Scratching and/or rubbing their heads and backs also helps calming them down if needed
~ Rubbing their bellies kind of helps, but only when they feel like it and their not in a grumpy mood. It is also their most ticklish spot >:3

Weaknesses:
~ Catnip... Oh come on,  you saw that coming at one point didn't you?
~ Cuddles... They love cuddling so much. Even the toughest ones :3
~ Ear Scratches
~ Curiosity... Ever heard of curiosity killed the cat?
~ Anger... It blinds them to the point where they forgot who they were angry at in the first place