Double holy? Well Corinthians 7:1-40 says "Now concerning the matters about which you wrote: “It is good for a man not to have sexual relations with a woman.” But because of the temptation to sexual immorality, each man should have his own wife and each woman her own husband. The husband should give to his wife her conjugal rights, and likewise the wife to her husband. For the wife does not have authority over her own body, but the husband does. Likewise the husband does not have authority over his own body, but the wife does. Do not deprive one another, except perhaps by agreement for a limited time, that you may devote yourselves to prayer; but then come together again, so that Satan may not tempt you because of your lack of self-control."
Btw, I joking in the other comment. The passage zombie is talking about has to do with marriage making two people one. And depriving each other from a something god created does not make it more holy, it in fact, makes it less. The only time to tell to the other "no" is so that you can go and have time with God. Kind of like fasting but with sex.
My parents are like super Catholic. They had my older brother five years after marriage and me two years later. Two miscarriages in all and three living children today
What? 4 people don't like a good veggie-oiled potato massage?