A good argument against the theory 

 is the biological cause behind 

 birthmarks and pigmentdisorders in 

 general. 

​

 What do skincells do in order to 

 become darker/lighter/red in comparison

 to the skin around it?

​

 A conversation with a dermatologist 

 could provide this type of information. 

​

 An interesting tension that this creates 

 is that most people visit these type of 

 practices to get their birthmarks 

 removed.