I totally believe that there are some people whose feelings are so strong that they could never have a fulfilling heterosexual relationship. On the other hand, There are many -- especially teens -- who are confused about sexuality in general, and are willing to experiment with whatever is acceptable in their peer group. I know that during puberty, I had some very weird feelings and dreams, and if I had not been taught that all sexual contact outside of marriage is a sin, and will lead to unhappiness, I probably would have done some experimentation myself, just to see what the fuss was about.
The same goes for smoking -- I often have dreams where I'm a heavy smoker. Probably, if I tried smoking, drugs, or alcohol, I would quickly become addicted, and they would become a defining part of my life. Yet I've been warned that they're not healthy physically, emotionally or spiritually, so I stay away from them. Am I missing out on something? Yeah. I don't get those highs. But do I therefore feel that my life is empty and unfulfilled? No.
The people we're doing this for are those children who, in an atmosphere of permissiveness about sexual experimentation, would make choices that would lead them to unhappiness, yet in an atmosphere that stresses abstinence until total fidelity in marriage, would make choices that will lead to eternal happiness.