Your nun fetish is natural, just uncommon.
Weirdness is defined mainly by how unusual it is for something to occur, homosexuality occurs in a fairly large portion of society (one in ten is it?) and as such while often shunned by hetrosexuals (as they make up a larger portion of society) is not considered as weird as other sexual desires such as bondage and pedophilia.
As such your nun fetish would be considered by most people to be weirder than homosexuality as its less common.








