A relationship that is mostly monogamous with occasional, agreed-upon flexibility for outside sexual encounters.

[garybo]

Annie and I have been married for 60 years, in that timespan I have had a few sexual relationships with other women, I can't remember how many, but in the teen's. Annie has also had a few relationships with other men, how many, I don't know.

I often read or hear about other married couples doing the same and having a hard time reconciling with each other. 

In my opinion there is not need for reconciliation, it happens, it is part of what Mother Nature has given us, "desire". Some have more than others, but any normal person has it.

garybo

[Gebidozo]

It feels like you’re trying to convince yourself that everything is fine when it is not.

What is the problem?