Mable is literally me in a cartoon. We even look the same. I was wearing sweater the other day and I was fangirling and one of my friends said that i reminded her of mable right to the ugly sweater. I told it it wasnt ugly, IT WAS GLITTERFULL!
Awesome theory<< actually in an interview with Alex, he said that dipper's birthmark is based off a kids acne in high school who one day had a perfect alignment of the big dipper on his forehead. BUT I THIN K THIS IS JUST A COVER!