As any traditional catholic can tell you, God is male.  Which means He has genitalia and chromosomes. Thus, God the Father, and the Son.  Not sure about the Holy Ghost, it is probably man in Spirit.  This is all very logical.  You could ask Aquinas, but I understand he is currently in purgatory writing "I will not corrupt Jesus' teachings with misapplied logic" a trillion times as a penance for, well, doing just that.