*Sorry if this is your 3rd time seeing this thread. I privated the first one and accidentally posted the second one under Case Discussions*

Hey everyone. I've been wondering what exactly causes this kind of jaw. The type of jaw in particular some may call a "bicylce seat face", it appears to have prominent masseter muscles and a long, slim, tapering, almost "scooped-in" chin. Some celebrity examples I have include Pete Davidson, Timothee Chalamet, and Shawn Mendes.
If it's worth noting, both Pete Davidson and Shawn Mendes had braces when they were younger. Shawn Mendes was also a mouth breather when he was younger and I occasionally see Pete Davidson mouth breathing. I'm seriously considering mouth breathing right now to achieve this kind of jaw as I am still a teenager with braces lol.
Anyways, if someone can help me that would be much appreciated. Thanks.