This is an expression of what it means to be a prude. I understand that there have been times when the church has taught that sex was evil and the only time you could be sexually involved, even in marriage, was with the intent to procreate. Nothing could be further from the truth. That teaching is a residue of the Gnostic heresies that seeped into the church from the culture of Bible times and soon after. The teaching of Gnosticism that is involved here is the duality of existence. The spiritual was good. The physical was bad. Thus sex, since it was physical, was bad and could only be a part of your life to make children.
These people evidently had not read Paul’s writings. I give it here in the NASB because it is clearer.
(1 Corinthians 7:5 NAS77) Stop depriving one another, except by agreement for a time that you may devote yourselves to prayer, and come together again lest Satan tempt you because of your lack of self-control.Read the whole passage to get the entire message. It agrees with Proverbs.
So? If you are married, enjoy the act of marriage. If you aren’t, I am sorry but chastity is still your only choice.