Christin's;Why God does not have God!.....But Jesus son of Mary did have God?

A man sinned and lost paradise ....it is only A Man who has to regain it ....and man could not because he is not perfect and no sacrifice he would make will suffice ....so God HImself became man, Jesus, to reconcile man to God ....He has to be the perfect man but should be a man in all senses ...so Jesus lived an exemplary life of a sinless Man , so He humbled Himself in all aspects and called God in heaven as His Father and in turn God called Jesus as HIs Son.