Its a mans world, and King always trumps Queen, at least when both are on the same Throne (married to each other). The only joint rulers England has had are rare, like that of William and Mary and had to be agreed upon at the time of the marriage as part of the marriage pact. However, there were circumstances that required such a deal at that time. However, when Princess Elizabeth married there was no need for a strong King to help uphold his wifes right to rule and Phillip was man enough not to require such a dispensation. He was Prince Consort, like his great-great-grandfather Prince Albert. In many ways, men get to make the rules in life, however, in this instance, for Queen Elizabeth it paid off as she's Queen and Phillip is her Prince.