The USA is a nation designed for sane, rational people who want to live happily in this world (emphasis yours).
You have absolutely no concept of Christianity, do you? The vast majority of Americans believe in an afterlife better than this one.
A satisfying sex life with one's husband or wife is necessary for that happiness.
Did you actually manage to find a spouse who shares this shallow view?
When the sole purpose of sex is procreation, love and intimacy, because they tend to culminate in sex for its own sake...
So love and intimacy tend culminate from sex is only for it's own sake?
...become problematic, as does the happiness which results from that love and intimacy.
This is a view of sex as nothing more than a drug.
...and as it detracts from individual happiness, is morally wrong.
A morality of self gratification? This is called hedonism.
Contraception changes that.
So contraception makes sex morally right? Can I then assume that you believe that sex for procreation is morally wrong?
A religious argument which posits that taking the pill is the first step on a slippery slope to abortion as contraception requires faith to convince
The abortifacient aspects to hormone based and IUD type contraception has nothing too do with religion, it is a scientific fact.
This post represents a remarkably sad world view. I hope for your sake that you were just trolling.
You imagine this statement: A satisfying sex life with one's husband or wife is necessary for that happiness shallow, somehow. I have observed that a marriage devoid of sexual satisfaction is a nuthouse able to maintain a carefully maintained mask of sanity. Religious delusions figure prominently in maintaining that fragile guise.
"Did you actually manage to find a spouse who shares this shallow view?"
Mind your own bloody business. One thing I find extremely distasteful in the religiously pre-occupied is how they feel entitled to invade the privacy of everybody and anybody, total strangers, working acquaintences, whoever. Anyone is fair game. It's irritating beyond belief.
"So love and intimacy tend culminate from sex is only for it's own sake?"
Have you ever held a woman you love passionately in your arms? Do you have any idea of the kinship between love and death? Do you know what love is? Have you ever been in love? This is the kind of question only a sexless alien or a sentient robot would ask. I am flabbergasted that any adult would be able to ask it.
"...become problematic, as does the happiness which results from that love and intimacy.
This is a view of sex as nothing more than a drug."
If you derive no happiness from the sex, bonding and intimacy with that absolutely necessary other without whom life is not worth living, then you need some serious professional help.
"...and as it detracts from individual happiness, is morally wrong.
A morality of self gratification? This is called hedonism."
Read the Declaration of Independence. It deals with rational self interest, and if you think that's hedonism, then you need to go back to the 8th grade.
All else proceeds from that. This other comment:
"Can I then assume that you believe that sex for procreation is morally wrong? "
is something your 8th grade English teacher should call you out on.
I hope that you are a junior high school student and not of voting age.