everybody and every situation is different.
if an ex is an ex spouse it is different.
if there are children involved it is different...people stay friendly or civil for their sake.
if you have celebrity it is different. of course, i think they should all just get into one big bed and get it over with
i had two different situations...a long term ex husband, who i loved for a while after breaking up...he actual left me with some ultimatums...but didn't like much...finally broke all contact with him because of his deep seated animosity and hypocrisy. if i ran into him...i would be civil...but no point to anything after that. he believed exes should be friends...HIS ex in particular...but all she had was a perverse interest in what i was all about.
my ex fiance was a low life from the start...i finally left him for good and he was nasty at first then missed me an wanted to get back together for years even after i was re married...i meantioned money he owed me and total silence after that. again i would be civil on meeting but no more... wounds still not healed so even that would be difficult.
i would not want to be friends with someone who used and deceived me...what is the point. sometimes i think people think they have to be friends with all the exes to prove they have move on or not jealous or above all that common "feeling or emotional thing"
i also want to know what not being a masochist has to do with men being friends with exes and why you would want someone like this to "miss" you