Sometimes they want or think they want the betrayed spouse to have their own fling so that they never can have the affair held over their head in the future, cuz you got your fling as well, and to alleviate guilt.
I am so glad you asked him directly...good job!
T^2
In the depths of winter, I finally learned that within me there lay an invincible summer. - Albert Camus
Uncertainty is the very condition which impels people to unfold their powers.-Eric Fromm