My dad has a gap between his upper two front teeth. As I child, I never noticed it until I was told that when I was little, I had the same thing and the dentist cut something (the labial frenum) so that mine would not have a gap. Both my sons have the same gap, as we chose not to have the same procedure done for them.
As they became young men in Burkina Faso (we lived there for the first 12-14 years of their lives), the people there would remark on how handsome they were. Sometimes they would specifically comment on that lovely gap between their two front teeth. That is how we learned that a gap between one’s upper front teeth is considered a mark of beauty in Burkina Faso and some other places, like Kenya.
Beauty can be, in fact, less than skin deep. It varies from place to place and time to time.