Many Christians have long believed that sex is a necessary evil to produce children. The ancient Jews understood that sex is a positive gift from God, so much so that marriage was a time of great celebration, because it was the beginning of the sexual life of the couple. In Deuteronomy 22: 13-19, it shows the custom of the time, where the man took the woman, whose signs of virginity of the girl was the blood-soiled sheet, which her father used as evidence against the accusing man.
During the time of the new testament, there were serious problems with the sexual attitude, but the plain thing is that the bible is totally in favor of sex as long as it is a healthy sex. The first command given by God was:
"And God created man in his own image: in the image of God created he him; man and woman created them.
And God blessed them, and God said unto them, Be fruitful, and multiply, and replenish the earth, and subdue it; and rule over the fish of the sea, and over the birds of the air, and over every beast that moveth upon the earth. Genesis 1: 27-28 "
In this we see that the order is clear, sex should be between a man and a woman, and that both should fill the earth. It is noted that it is the time when two totally different beings become one. "And Adam said, This is now bone of my bones, and flesh of my flesh; she shall be called a woman, because she was taken of man. Genesis 2:23 ". That's why sex outside marriage is condemned by the bible "Flee from prostitution. All the sin that a man commits is outside the body; but he that prostitutes sins against his own body. 1 Corinthians 6:18. "
So it was God who invented sex, not that sex that enslaves and destroys homes, but good, good sex and sex, the husband's sex with his wife, who should have pleasure, and must also have the gift of the generation of a child, for this is the reward of God to the couples.