Bạn sẽ học cách yêu sự xuống cấp của mình, bởi vì đó là điều duy nhất khiến bạn cảm thấy sống động

So, let's assume that you've been doing something with your mouth for half an hour already, right?

Your jaw starts to hurt, and for many bottoms it's a good sign, you see?

It means that you're doing something right, you're able to please an awful for, you see, half an hour straight without a pause.

But, let's assume that your jaw is getting tired.