After this year’s college entrance exam, I am thinking about getting a long curved square jaw surgery. I'm so worried about sagging that I don't think I'll ever be able to become a clown. The good news is that the younger you are, the less saggy the square jaw becomes. Is this also true? Those of you who have done it, please give me a review.. Oh, and I chose my teeth, but my chin is a bit uneven due to my habit of picking my nails.. It would be better not to touch the lower jaw though, right? Please give me good advice.