The Evolutionary Case Against Monogamy, Ctd

A reader writes:

As someone who's lived in an open marriage for the last 8 years
have never had sex with anyone else but my wife since we met, I
our experience might shed light on the actual experience.

I was 38 when we married. I'd been married before and saw that
implode over one issue: Trust. (Which had nothing to do
infidelity. There was none).

When we got together we agreed that this, more than any other thing,would destroy the marriage.  So we talked about trust...