Imagine a girl that left her boyfriend for another guy, only for her to be used and dumped later by the new guy. Now she is heartbroken, sober and vulnerable, and indirectly trying to get back with her ex by being caring, respectful and loving towards him. Most girls like learning their lessons the hard way. Its until when they get hurt, thats when they tend to know who is good for them. But when they are hurting a guy cos of another guy, they usually feel they are doing the right thing, only to get their fingers burnt and ass dumped later.

I don't have Ex..
meanwhile..
FTC..now my birthright!

It's vice-versa o.p, I've seen a guy who left his gf for another, and after the gf(ex) has now moved on, he's now begging for a comeback...so that your advise should be for all gender and not just girls o.