Guys/ladies ... how would you feel if your current partner keeps a cordial relationship with their ex?

Honestly- jealous.... depending on which ex and how serious their relationship was.

Most of his relationships before me were not serious - so a few of them I wouldn't care much because I know he wouldn't be spending any time on them. - he only had one serious girlfriend before me and it didn't end well from what I've heard. I mean it's not like id be a raving lunatic, but I would feel a bit insecure, even though we've been through a lot as a couple. I know he wouldn't cheat, he would definitely tell me before he ever did sleep with someone else, but that doesn't mean she wouldn't try to get him to. Some of these women have no sense of self respect!

I mean just a few months ago an ex he hasn't seen in 7 years was telling him he should leave me, and take our kid so they could be a family. (She was never able to have her own kids which is really sad) but I don't feel bad enough for her to let her take my husband and my kids!

I've talked to an ex on and off over the last few years, we have strong feelings for each other but both of us know we have boundaries and would never cross them, we don't meet, up just talk or text - maybe like a few times a year.
We would certainly never ever ask the other to leave the family and kids to be with each other. We're both happy with our families and know that what we had would never ever be the same even if we tried, we've changed enough over the last 10 yrs to know better.
It's been a year and a half since I last talked to my ex. I don't plan on speaking to him again. Especially with what I'm going through because during grief it's so easy to form a bond or dependency that shouldn't be.

Everybody you ever meet is going to have a history with folk you know nothing about.
Stands to reason your significant other has a reasonable chance of being friends with someone to whom they were once romantically linked.
That's what being friends is. Sharing experiences; hating each other ! Finding some sort of resolution; having some sort of friendship afterwards.
But that's ALL it is!!

I thought that keeping cordial relationships with your ex'es used to be considered the good, model thing to do (And I don't mean like "Don't trash them by name in public" but "Keep in touch and possibly carefully emotionally support if need be). I don't think I've personally known one woman who's broken every contact with ex'es that they aren't obligated to (Children etc.) meet, though it seems for me even if they don't completely avoid me I'll make no effort to stay in touch. Now, more and more, the psychological thinking seems to start to be that only sociopaths can stay friends with their ex'es. Lol, oops. But I really think this is one of the things that depends on the persons involved, what they were interested in the first place, and whether they're happy with how things turned out for them.

i still talk to 3 of my exes. im upfront about it with everyone i date. so if i can do it i should be ok with them doing it. just depends how friendly they are. if they are best friend type relationship i couldnt handle that.

I am friends with some of my exes, so I would not have a problem, so long as they were not abused by said ex.

It's kind of different but I do have one w/my ex my partner and her are friends it's ok...your partner is with you.

Doesn't bother me.