Marriage Customs & Sex.
You'll have a different take on this depending on where you were raised, your beliefs and culture, your ethnic origin, life experience and age.
To some couples swinging, Which takes many forms feels natural and is part of a healthy sex life and healthy marriage.
Some People are weird.
weird Couples: bdsm and other stuff josef fritzl would no doubt approve of keeps them happy.
Polygamy: Openly non monogamous. The Greeks gave us The word Polygamy to describe any form of marriage where any partner has more than one spouse. This form of marriage has strategic benefits.
(polygamy is not where you start seeing another person before breaking up with your ex, that's infidelity.)
Affairs are relationships outside of The Marriage Contract which may or may not involve intercourse.
Lovers & Mistresses; Are Approved extra marital liaisons
The method of taking a lover or mistress varies
-in some cases the couple might participate in a threesome/foursome/swinging event/ orgy whatever. And by Mutual consent one partner will 'go steady'
-sometimes one partner will seek approval obtain it and either provide continuous updates or only pass on essential information such as mileage, expenses, name, occupation and age of the individual.
Mistresses/Lovers resolve hardware issues.
They balance out uneven sex drives.
Often A partner will play matchmaker and introduce their spouse to a lover/mistress. This may or may not be at the request of the other partner.
Mistresses/Lovers and Affairs may help couples fulfill unrealised sexual fantasies, helping relieve tension in the bedroom.
Example: wife pursuing a little/or a lot of lesbian side action.
Surrogates. Some Couples have difficulty conceiving. The earliest known surrogates are detailed in The Jewish Tanakh.
A surrogate is not A Lover or A Fighter. But a Mistress or a Lover can be a surrogate. As could the third person in an Affair who would cease to be an outsider having received two thumbs up.
The most common form of Surrogates Throughout history and in Modern Times involve the wife recruiting a suitable piece of ass for reproduction purposes.
Surrogates are often Paid, But they are not Prostitutes.
Your Thoughts Is Monogamy Practical?
And is universal Monogamy Possible.