I am not completey in agreement with PDT on this one.
I think if you expose to his friends and they don't "say" anything to him... They just keep quiet.. I think that may still embarass OM.. in some cases.
Allen, it's not the "keeping quiet" I'd be concerned about. It would be some of them actually agreeing, winking-and-nodding, enabling, etc. You've said it yourself, in today's society, it's sadly a small percentage of people who even stand up against infidelity anymore.
