Sex outside of marriage
The bible describe that as sexual immorality and adultery.
«Flee sexual immorality. Every sin that a man does is outside the body, but he who commits sexual immorality sins against his own body.» 1 Corinthians 6.18
«But I say to you that whoever looks at a woman to lust for her has already committed adultery with her in his heart.» Jesus quoted, in Matthew 5.28
Divorce and remarriage
The bible is clear about that one shall try to avoid divorce, and that remarrige is only allowed if the other part is dead.
«Now to the married I command, yet not I but the Lord: A wife is not to depart from her husband. But even if she does depart, let her remain unmarried or be reconciled to her husband. And a husband is not to divorce his wife.» 1 Corinthians 7.10-11
«But if the unbeliever departs, let him depart; a brother or a sister is not under bondage in such cases. But God has called us to peace.» 1 Chorinthians 7.15
«A wife is bound by law as long as her husband lives; but if her husband dies, she is at liberty to be married to whom she wishes, only in the Lord.» 1 Chorinthians 7.39
The Pharisees also came to Him, testing Him, and saying to Him, “Is it lawful for a man to divorce his wife for just any reason?”
«And He answered and said to them, “Have you not read that He who made them at the beginning ‘made them male and female,’ and said, ‘For this reason a man shall leave his father and mother and be joined to his wife, and the two shall become one flesh’? So then, they are no longer two but one flesh. Therefore what God has joined together, let not man separate.”
They said to Him, “Why then did Moses command to give a certificate of divorce, and to put her away?”
He said to them, “Moses, because of the hardness of your hearts, permitted you to divorce your wives, but from the beginning it was not so. And I say to you, whoever divorces his wife, except for sexual immorality, and marries another, commits adultery; and whoever marries her who is divorced commits adultery.”» Matthew 19.3-9
Homosexuality
The bible is clear about, that homesexual practice, is sin.
«You shall not lie with a male as with a woman. It is an abomination.» Leviticus 18.22
«For this reason God gave them up to vile passions. For even their women exchanged the natural use for what is against nature. Likewise also the men, leaving the natural use of the woman, burned in their lust for one another, men with men committing what is shameful, and receiving in themselves the penalty of their error which was due.» Romans 1.27-27
Idolatry
«And God spoke all these words, saying:
“I am the Lord your God, who brought you out of the land of Egypt, out of the house of [a]bondage.
“You shall have no other gods before Me.» Exodus 20.1-3
«Therefore, my beloved, flee from idolatry.» 1 Chorinthians 10.14
«Rather, that the things which the Gentiles sacrifice they sacrifice to demons and not to God, and I do not want you to have fellowship with demons.» 1 Chorinthians 10.20
Magic
Magic is referred to as a sin, and is found in so called healing («reiki master healing» etc), where one is in contact with evil spirits.
«And many who had believed came confessing and telling their deeds. Also, many of those who had practiced magic brought their books together and burned them in the sight of all. And they counted up the value of them, and it totaled fifty thousand pieces of silver.» Acts 19.18-19