XY=XX

Ludovic is a little kid, a reluctant part of the male gender trying to fit in with his "normal family", 

his brother's play soccer, his sister is a teenager who does teenage girl activities his parents 

are typical working class parents (father works, mother is a home-maker). 

Ludovic's theory of gender and sex is a lot similar to that of Anne Fausto-sterling.  

 

Anne Fausto-sterling's article on "how to build a man" talks about how men are made and not born.

she uses the term "social construction to drive home her point. she outlines fact's that detail how at birth if a newborn does not live up to some physical expectations to assure membership of one category, a rapid decision is made for the newborn and this newborn is immediately put into a differnt category. her argument is, if such decisions and practices are carried out in scientific institutions that allegedly hold answers that are supposedly true, then the truth in reference to gender is definitively skewered because gender is a doing, not a being. no one is born with a manual on how to be a man or woman, we all live  and learn these roles. all through this movie we see gender performativity, i.e. a member of one gender is forced to participate and carry out actions of another gender. one good example occur's in the scene where ludovic is forced to play soccer with his brothers and other kids, his actions clearly showed ludovic had no idea how the game was played but sure enough his dad was there cheering him on telling him " son, eventually you will get the hang of it". another example will be the scene where ludovic and Jerome sneak into the girl's bathroom, ludovic sits on the toilet and attempts to pee like a woman. he perform's this action without hassle, he then proclaims 

to Jerome that he is indeed a girl because he just performed an action supposedly carried out by only women. 

Pam in my opinion is the uniting force between all gender's. she is sort of a figure of authority that wants happiness for all, including herself, an embodiment of what society is supposed to be.