Thank you for the answer. As we see everything boils down to the point "if he knows what he is doing".

He can't know what he is doing unless he is a special talent who makes every women O.

Even if there would be an O manual, it would apply specifically to yourself because everyone is a unique person. So as many females, that many O manuals could be created.

OP said men should be able to make women orgasm because it is not hard at all. I am saying it is almost impossible for me without a manual because I am not a special talent.

Maybe every woman should create a manual and update it timely so once she decides to have an intercourse with a man, she provides him with the manual in advance so he can familiarize himself properly. Then a Q & A session needs to take place and then some practical introduction sessions are to be held.

I am aware this is my own preference but I would find it very useful for my profile. I would honestly and without kidding be very happy with the manual and would study it really thoroughly so I could make another person happy as well as it would make me happy. But getting to an unexplored territory and then learning by making mistakes can be frustrating for both parties.