ok i'll try and see what scaling the head would look like, although i dont think its too large.
another possibility is that all the woman in Belgium have large heads, or the US woman have small heads :p
errr.. or is it the forehead and top of the head that is too big, not the face proportions comparing to the body?

and would you explain what makes you think its a man? do others share that opinion? maybe adding hair may change that ?

Greets