how to shape our jawline?

The jawline is the most attractive part of the body, if you change its shape your face will wondrously change and I can promise you that it makes you more attractive but before that I tell you how to change it, I should say that your jawline is a muscle, just like other muscles in your body if you train it, it will become bigger.
Now that you know how it gets bigger you may be thinking that like other muscles you need to lift weights or train it with some kind of athletic machine but that's not true because you can change your jawline by simply changing the way you breathe, consider that this is the first level that you need to master, breathing with your nose, recent studies show that breathing by your mouth can make your jawline muscles to decrease in size and it's not only that, also it this way of breathing is not good for your lungs and that's because when you breathe from your nose your breaths will be cleaner to summarize, fewer bacterias enter your body with this way of breathing which is called mewing I know it is kinda weird but despite its weirdness in the name it's very useful and easy to do when I say easy I really mean it because all you need to do is to stick your tongue to the top of your mouth just like the picture below