THE BIG DEABATE: Is It Possible To Maintain A Casual Relationship With An Ex-Lover?

Not everyone is fortunate enough to get married to his/her first love. For some of us, we go through several exes before finding our right life partners.  At some point, others even may think they have found the right partner, get married, and later find themselves divorced.  For some of us, we run through a few hurdles before settling down with our Adam or Eve.
Which sparked  up a curious sensitive  question.... Can one maintain a casual relationship with an Ex-Lover?   Sound of your opinions in comments

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