'Sexual Relations' in the Bible

Now the birth of Christ happened this way: When His mother Mary was engaged to marry Joseph, [but] before they had a sexual relationship, she was discovered to be pregnant by [the power of] the Holy Spirit.

and {did not have sexual relations with} her until she gave birth to a son. And he called his name Jesus.

And Mary said to the angel, "How will this be, since I have not had sexual relations with a man?"

For this reason God gave them over to dishonorable passions. For their women exchanged the natural sexual relations for unnatural ones,

Or do you not know that the unrighteous will not inherit the Kingdom of God? Do not be deceived. Neither the sexually immoral, nor idolaters, nor adulterers, nor effeminate, nor men who have sexual relations with men,

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

for the sexually immoral, for men who have sexual relations with men, for kidnappers, for liars, for perjurers, and for any other thing contrary to the sound doctrine;