There is a mountain of data on average frequency of intercourse among happy, healthy married couples. Many factors have to be eliminated in order to find the "true" numbers. Both parties have to be healthy and have normal sexual inclinations, with no outside factors that would impede the activities.
Frequency of sexual activity generally decreases in a linear way, and is fairly consistent with the testosterone level of the husband.
Teens who are married will have sex 4-6 times per week, possibly interrupted by the wife's menstrual period. In their 20's it will become 3x/wk, dropping steadily until the 50's, when it is 1-2 times per week. After 65, a couple times a month. Beyond that, it is almost exclusively determined by health issues.
But in actual cases, it varies all over the map, and SHOULD BE DETERMINED by their joint desires and inclinations. There are couples in their 30's who only do it a couple times a year, and couples in their 60's who do it a couple times a week. Problems arise when there is a great disparity in desires, which may or may not be resolvable through counseling or pharmaceuticals. I understand there is a 'Viagra for Women" that will be hitting the market soon.
And don't forget the impact of Cialis and Viagra. They have resurrected the sex lives of many couples over 60, many of whom now are on a "schedule."
Usually this question comes up when a man or woman is concerned that s/he isn't getting his or her fair share of nookie. Counseling is the best first step, if both parties are willing.
It's really, really easy. Really easy. Lol!
