Fom the main heading of this thread:
"Does passion die with familiarity? One psychiatrist, a contributor to this web site, offered a different perspective: "My wife and I have been married for 28 years and sex has never been better." For him, successful marriage increased intimacy and deepened sexual satisfaction."
I'd like to suggest that this guy's situation is the exception, not the rule for most marriages. The sex you have after years in a marriage is never, ever like the sex you had when you first meet a person.
Some couples can accept this fact and are (I won't say happy) but are content with sex with the same person over and over. Maybe the sex they had when single wasn't that good or maybe people have waited until marriage to have sex and know no other sexual partners than their husbands/wives.
But those of use who had great sex lives while single with a variety of partners know the great sexual desire and excitement you get pursuing and bedding a new partner. We remember the freedom we had to walk away when the sex began to change into a stifiling routine in order to once again enjoy the heightened desire of sex with a new lover.
Marriage traps you sexually and limits your sexual reprtoire. The thrill of the chase is gone forever and the joys of sexually discovering someone new vanish from you life.
Sure, it would be nice to be like the psychiatrist and his wife but that is pretty rare. The proof of this is in the number of men and women in marriages with desire difficulties. Women cpomplain they can't orgasm, men can't get aroused enough with their wives to get an erection or ejaculate. Couples become bored and sex dwindles down to almost nothing. Men turn to porn to try to enjoy the sexual variety and rekindle that excitment felt as bachelors with discovering someone new (albeit only in fantasy.
Sexless marriages, divorce, affairs, porn, boredom, sexual dysfunction. These are what most modern marriages are like today. Perhaps the psychiatrist could give us a detailed explanation on the secret of his sexual success. Millions of us would like to know.