I echo a few other comments made by other members. I have been with my wife for 11 years (married 6 years). Whilst I don't punt much, my wife knows and I have always asked her permission to ensure she is OK with it. She just asks for honesty, do not hide it from her and that I only see MLs.

She knows that I have desires that sometimes she cannot fulfill and that there is no emotional connection with the ML.

We are both happy and have a healthy sex life - well I think it's healthy, given we have 2 kids! Haha