In view of the fact that there is little, if anything, in the Church’s moral teaching that comes under the heading of “Solemn, Infallible Teaching”, how can we know for certain what is right and wrong?
Quite simply put-
For morals:
The decalogue.
Everything is based on it. Pretty simple. The Church teachings come from there and the New Testament. Practically the religion is 85% judaism and 15% Christian. That’s the weight of the Bible between Old and New Testament. Moses and Christ. Go figure! What Christians are is really Jews for Jesus!! Ironic how semantics coupled with arithmetic can reveal and enlighten hidden truths. There aren’t any real pure 100% Christians. We all follow moses and the Old testament 85% i.e. 5 times more than Christ! Go figure!
Without the Old testament the priests wouldn’t know what to say because very few people actually understand the New Testament and which parts are literal and which are metaphorical. Not many understand Christ i.e. God. Quite simply put.
That’s the reason why there have been so many different interpretations-heresies, schisms. What they are is just different interpretations of the same thing really. God.
The Dogma of Infallibility of the Pope is so to preserve the Unity of the Church. Just look what became of the Lutheran Reform and all the various sects that sprung from it! Absolute anarchy and chaos. Everyone interpreting things for themselves without having the slightest idea of what they are talking about.
Obama isn’t infallible. Neither is the Pope. They’re men. God is infallible. Peter never said he was. Christ called him satan meaning he was wrong. What Peter wanted was for Christ not to die. That’s it. It was love for a friend. He didn’t understand Christ’s mission. Just like no one did until he Resurrected. And no Peter wasn’t satan. Many Protestants Luther first and foremost call the Pope i.e. successor of Peter the antichrist based on that!! Ridiculous.
The impurity rituals - mosaic laws were abrogated when Paul rightly interpreted Christ’s teachings on them. I.e. it doesn’t matter what you eat as everything gets digested and what is impure comes out and goes in the sewers. That’s why we eat pork! Thank you Paul for your correct interpretation of Christ! One of the few. Otherwise eating pork was considered impure!!!
Therefore ALL the things about ritual impurity, what to wear, how long your beard must be and other legalistic nonsense have come to pass. And were always man made traditions. Which should have been disregarded in the first place from the beginning but superstition is much more powerful than Faith. When you want to enslave people just invent rituals and tell them God wants you to obey them. If not you’ll go to hell and be punished. What it really means is: don’t eat pork so that you are at our mercy and are controlled by us. We love power. And reinforce our power amongst ourselves at your detriment with rules concocted by us.
“They want the first seats and the names and give glory to each other but are whited sepulchres” or something like that. That’s what I find in priests of today! Most of them. Not all.
That’s why Christ died and that’s why he was hated by the Pharisees who got Him killed. He was destroying their kingdom!!! That’s why he freed us and what he freed us from!
Anyone who regresses into phariseism and legalism is indeed crucifying Him again.
Other pharisees have took the place of the older ones! And more powerful.
Anyway the commandment not to commit adultery was expanded to include don’t commit impure acts and there goes illogicity . First the impurity rituals were abrogated then reinstated. But not to include the ritual impurities but the sexual impurities.
The sexual impurities (that’s what concerns you I suppose) were invented as time went on and people became more “emancipated”. Masturbation is considered to be impure. And put on the same level as anal sex for example! why? Because both aren’t acts for procreation. Ridiculous. Masturbation was considered a sin in the Old Testament and called Onanism. From Onan. Today any sexual act is illicit if not with procreation in mind even premarital sex. Again just plain ridiculous.
People back then used to marry at 15/16/17 and hence were virgins when they wed. Not because they were chosen people and particularly chaste. But because they married earlier during puberty!! What a feat indeed!
Fides et Ratio. Not sola fide like the protestants!
Anyway this is what historically happened. Yes I’m Catholic!
Yes you can have sex if you want! The Commandment is don’t commit adultery. Which means Be Faithful to the woman you love (much nicer put love is clearly stated and not just a prohibition) !!! Assuming you’re a man.
Things pass and change. The New Testament is the only thing which shall remain. The Old is slowly being eroded by scientific discoveries and better understanding of the New.
I believe God spoke clearly only in the New. In the Old it was people who spoke for Him. In the New He spoke for Himself. Who doesn’t understand this fact doesn’t understand the core of the Faith. The basics. This is why there were people who thought that there were 2 gods. A bad one and a good one. One in the Old and another different one in the New. It was just that in the Old men spoke about God. In the New He Spoke.
The Church once taught that the world was heliocentric because it read it in the Old Testament. Many of the worse things that it committed and Pope JPII asked the world for forgiveness

was due to the things written in the Old Testament. To protect judaism i.e the Old Testament and its myths the Church of Christ sinned! Incredible. But not so. In that the New isn’t the Old. And wanting it to be is a sin if not the greatest one! Sin is error…
Hope it helps.