WATCH: Sexual Permissiveness Now May Lead to Messed Up Marriage Later

Oftentimes those who preach sexual abstinence have been told to stop trying to impose their beliefs on others. But what if science could prove sexual permissiveness does great damage to future sexual happiness?

That's what Dr. Joe McIlhaney of the Medical Institute for Sexual Health in Austin says. New research shows that sleeping around now could ruin your chances of having a happy, fulfilling marriage later.

"Neuroscientists have produced a lot of information in just the last few years. This is new," he told CBN News.

The sex reseacher recently co-authored the book Hooked: New Science on How Casual Sex is Affecting Our Children with Dr. Freda McKissic Bush. McIlhaney said the book contains, "The most modern neuro-science available to man today."

Research using brain scans now shows powerful chemicals are released during sex that should create a powerful, everlasting bond.

"When women are skin-to-skin with a man, their brain secretes oxytocin that causes them to bond emotionally to that man. Men secrete a hormone called vasopressin when they're having that kind of intimate behavior. And that hormone has even been called 'monogamy hormone' for men. And it bonds them to the woman," McIlhaney explained.

This oxytocin is so overwhelming in a woman's brain that just a 20-second hug can cause a female to become bonded to a male.

Both sexes get addictive doses of the pleasure-chemical dopamine as well during intimate behavior. That works out well for couples out to create lifelong marriages and stable families.

"They're addicted to sex, and babies result from that. They're bonded to each other," McIlhaney said.