The logical reasons for not allowing women to serve as deacons are numerous and well known:
Jesus was a man and so was his dad, so only people with male genitalia may be deacons;
The twelve were men, so Jesus always intended deacons to be men (although they don't have to be jewish and every twelfth one does not have to be a traitor);
tradition!;
it just doesn't feel right to the men running the Church.

I think that covered all the bases.