What are the reasons why there cannot be a female pope?

It seems the question is not even up for conversation, in theory it seems any Catholic male can become pope, not so for women, but in the past some theologians have raised issue and argued that women should be ordained, and that the reason why women are so strongly protested against becoming popes or priests for that matter is all down to the claim that Jesus chose male apostles, many agree that this reasoning does not stand, and is not enough to ban females from the priesthood, but there was in fact a female pope before, pope Joan….
I just wanted to throw this question out there to see your personal views on this, What do you think..?...should women stay away from the pulpit, should there be female popes/priests or is everything in it’s rightful place and women shouldn’t be allowed to enter, women have played a vital role within the ministry for centuries…your views please….