this is just for fun. Lets think of as many reasons as we can for Lexie being totally bald.
1) Superman got mad and tore out Luther's hair.
2) Otis forgot which vial held the Rogain and which held the secret formula...
3) Lois used Nair on his hair
4) Kryptonite really does affect humans...makes your hair fall out.
5) Heat ray vision bounces off a shiny object (Lexie did it to himself)
6) Lex ate dynamite and his hair came out in bangs...
7) Spray on hair is flammable
OK, now its your turn.