A static member function can be used without referring to a specific object, using only a class name. They have no ‘this’ pointer, so they cannot access class member data unless they are passed a ‘this’ pointer explicitly.
We can't declare constructors to be static. If a constructor was allowed to be static, it could be invoked without a ‘this’ pointer and therefore would not be able to build specific objects from raw storage.   _{Your Comment}