It is true, that we have this phobia in the U.S. (or "Western cultures" in general) about sexuality and the body.
I was looking at your definition of celebacy, and maybe the reason it changed from "unmarried" to "avoidance of sex" is because it is well known that if you are unmarried, you are also avoiding sex. And the reason you are unmarried is because you want to also avoid sex or feel the need for a sexual relationship. Therefore, the conclusion is that being celebate is to avoid sex.
We do not want to be shy about teaching our children about sex. We
need them to know and have some understanding so they will not get into trouble when they are teens. Teens get in trouble because they were not taught properly, or not taught at all. Avoidance of sex and avoidance of understanding it is two different things. You have to understand it before you know what to avoid or why you are avoiding it.
The "Church" has done a lot of harm when making sex out like the villan rather than the misuse of sex. Sex is a wonderful gift God gave to mankind. Even animals have been given this gift. Satan cannot reproduce, create or duplicate himself except by taking over the minds of others. And that is only temporary since man is designed by the Creator to die. So Satan cannot keep his "kingdom" going. Only Jesus Christ can have an eternal Kingdom that not only keeps on going and going and going, but grows exponentially through sex.
Awesome isn't it?
But God prefers that we are married. When you have sex with someone (assuming, of course, the "opposite" sex), you are now one.
Pauls idea of celebacy is due to the fact that some people are not cut out for marriage and are just as happy being single. But he didn't make that an excuse to go and have sex with any one he wants to because he isn't "tied down". He is "tied down": To Christ. He feels his relationship to Jesus is far better and more advantageous to the ministry he was called to. So he happily and successfuly led a celebate life for Christ. He didn't feel he lost anything, but gained much more.
But not everyone is cut out for the celebate life, so being married is needed to keep him (or her) from sinning (meaning sexual sins outside the marriage). They are also the type that needs a physical relationship with someone to feel whole. I am the type who has to be married. My first wife left me, and it wasn't long after before I went on a search for another. But I asked God to find her for me. And he did.
Churches need to understand the difference. And teach it properly, without shame or embarrassment.
Boyd Allen