This is a particularly ornate graphic of the traditional "heart" well-known to recipients of Hallmark greeting cards for Valentines Day.
If one examines the reason for that particular graphic symbol, one discovers that it's meant to be a symbol of a human female vulva. It's absurd to say that it looks anything like an actual heart, which is basically an internal organ that's responsible for moving blood about in the body.
Sex is an intrinsic part of humanity, to the point that psychologist Abraham Maslow put it at the very bottom of his pyramid of human needs (along with basic biological functions like breathing, eating and defecating).
Without sex, the human species would have died out right after Adam and Eve sinned in the Garden of Eden. It's disingenuous to suggest that sex has nothing to do with the existence of the Christian church, because there would be no one to fill church pews if there were no people on earth.
As important and elemental as sex is, it does not necessarily follow that all sexual acts involve the "heart" (a euphemism for the human soul). There lies the difference between wives and prostitutes.
A prostitute, like the legal whores at Nevada brothels like the Bunny Ranch, seldom if ever really loves her customers or clients. It's just a business for her. A man who deludes himself into thinking that she will ever mourn his death when he dies is in for a load of heartache.
That doesn't mean that it is not understandable that a man might be willing to "settle" for sex that is devoid of real love. St. Paul said in I Corinthians 7 that marriage had been created so that men and women could experience "the joy of sex" (as author Alex Comfort called it) without committing the sin of fornication.
Too many churches regard it as unimportant to help single believers to find loving wives or husbands. They are more interested in "passing the buck" than in taking responsibility for their members. They are "guilt mongers".
If a Christian looks at pornography, he's in for a load of condemnation, even though the Bible says that Satan is the Accuser of the Brethren.
For any Christian who has sex outside of marriage, things are even worse. Nevertheless, Relevant Magazine recently published a survey showing that numerous young Christians were not waiting for marriage before having sex. If indeed fornication is an unforgiveable sin, there are huge numbers of Christians who will be burning in Hell.
Fortunately, salvation is not granted to people because they are perfectly pure. It is a GIFT, given to mankind on the basis of Jesus' atoning death on the cross of Calvary.