That’s total crappola. No reason at all you can’t stay friendly with ex’s.
>>No reason at all you cant stay friendly with exs.<<
You’ve obviously never seen “When Harry Met Sally”.
If you’ve slept with someone, once one of you finds another, the relationship needs to be permanentaly elimintated. It is disrespectful to your current spouse.
I am reminded of that scene with the ex-boyfriend in Best of Show...