For us after 25 years of marriage, every 2 or 3 days, or 3 times per week. Sunday afternoons is usually set aside, and that can sometimes be routine but it can also be adventurous. Roleplay, a bit of BDSM, playing a game where we both win, outdoors sex in the summer, and anything else I can think up.

For sure as the years pass, anything done thousands of times would get routine. But it doesn't take too much effort to spice things up.

For Queenannie: the couples who lose interest in sex are in the majority and the couples who remain sexual over decades are in the minority. I think part of the problem is with many men who begin to overlook the non-sexual parts of the relationship: which includes helping out, being romantic, suprising their wives with something special. Part of the problem is with many women who don't communicate their needs, wants, desires and disappointments. Instead, feeling frustrated, they turn away from sex.

It takes effort in all ways to have to good relationship, and good sex within that relationship. Sex can be considered a barometer to a relationship's health, while at the same time it brings couples together and reinforces the love they feel for one-another.

The other thing that sex does is increase testosterone in both men and women, which increases sex drive, which means more sex, and so on. The converse is true, of course, less sex means less desire for sex, and so on.