Body Typing is a Grand Master's principle. This is a complex subject and does take time to fully understand and then apply. Understanding this is one of the keys to success in pressure points is being able to body type an attacker. Once you learn to do this you can apply their body type within the Cycle of Destruction and use this information to your advantage. As an example, if the person who is attacking is predominately fire, you know you can use either water or fire more effectively against them.
No one is person is totally one element, but they will be predominately one element. It takes time and practice to body type, but once you understand this it is a powerful way to use pressure points. Their use in self defense is 2-fold. First what is your body type, then what is the body type of the attacker.
Read more below on the characteristics.