There are very solid rational, Constitutional, and historical reasons for denying female suffrage. John Adams summarized them best in his famous written exchange with his wife:

"I long to hear that you have declared an independency. And, by the way, in the new code of laws which I suppose it will be necessary for you to make, I desire you would remember the ladies and be more generous and favorable to them than your ancestors.

"Do not put such unlimited power into the hands of the husbands.

"Remember, all men would be tyrants if they could. If particular care and attention is not paid to the ladies, we are determined to foment a rebellion, and will not hold ourselves bound by any laws in which we have no voice or representation."
- Abigail Adams, 31 March 1776

"Depend upon it, we know better than to repeal our masculine systems. Although they are in full force, you know they are little more than theory. We dare not exert our power in its full latitude. We are obliged to go fair and softly, and, in practice, you know we are the subjects.

"We have only the name of masters, and rather than give up this, which would completely subject us to the despotism of the petticoat, I hope General Washington and all our brave heroes would fight."
- John Adams, 14 April 1776

Events have proven John Adams correct. Free men are accustomed to voluntarily limiting the use of their power and not pushing it to the full extent of its capabilities. Women, to say the least, are not. Just as an angry woman does not pull her punches, women in politics do not restrain their instincts to attempt to control the uncontrollable. Abigail Adams is projecting: she wrongly assumes all men would be tyrants if they could because she knows that is true of herself and other women. And women do not hold themselves bound by laws in any case, regardless of whether they have had voice or representation or not. They are bound by fear.

This is why a nation that wishes to remain wealthy and free does not permit female involvement in its governance, and why totalitarians from the Italian Fascists to the Soviet Bolsheviks have historically made a priority of female involvement in the political process.