If you have a girlfriend now and feel that way, think of how much stronger that feeling will be with your wife someday. That's what I mean by "sex killed my best relationships." People can relate on many different levels -- emotionally, mentally, physically, spiritually.
But when my girlfriend and I started relating mostly physically, it short-circuited the other parts of our relationship.
Instead of realizing that a car can't really satisfy us, we usually make the error of thinking, "Well, I guess that wasn't the one will give me lasting fulfillment.") But the emptiness continued. That is, their perspective on the whole thing is very different from a guy's.
So, finally, I came to the conclusion that premarital sex wasn't all it's cracked up to be. Often a girl will justify sex by saying, "But I love him," even if she doesn't really want to go through with it. It's been said that, "Girls use sex to get love; guys use love to get sex." This is how it works: the girl is picturing marrying the guy some day; the guy is picturing everything he wants to do with the girl before he goes back to tell his buddies about it.
It's like no one wants to acknowledge that it's happening, even though it is. Because we'll go into the marriage with me having more respect for her and her having more trust in me.
When I put myself in the shoes of those men, I wish that I hadn't done what I've done. Would I want some guy like me taking advantage of her? They're someone else's future wife, someone else's daughter, sister, etc.
I know a newlywed couple who have sex less than once a month because of this -- he doesn't respect her, she knows it, and she doesn't trust him, so she doesn't want to give herself to him.
It's very sad, and more common than you might think.
That's something you won't see on TV or in the movies, but it happens a lot. The "love hangover" was a strange occurrence for me.
Mainly because when I was in college, sex was my "god." As a male, it's what I thought about morning, noon and night. If you have, you should stop and consider, "Why is that?