Now with regard to the issues you wrote about: “It is good for a man not to have sexual relations with a woman.” ¹ 

The young woman was very beautiful; she became the king’s nurse and served him, but the king did not have sexual relations with her. ¹ 

So it is with ¹  the one who has sex with ²  his neighbor’s wife; no one ³  who touches ⁴  her will escape ⁵  punishment. ⁶ 

But Onan knew that the child ¹  would not be considered his. ²  So whenever ³  he had sexual relations with ⁴  his brother’s wife, he withdrew prematurely ⁵  so as not to give his brother a descendant.

Judah recognized them and said, “She is more upright ¹  than I am, because I wouldn’t give her to Shelah my son.” He did not have sexual relations with her ²  again.

It is actually reported that sexual immorality exists among you, the kind of immorality that is not permitted even among the Gentiles, so that someone is cohabiting with ¹  his father’s wife.