How do you ask your girlfriend why they broke up with you when yall are going out again?!?

Im helping a friend, and he wants to know why she broke up with him.

*They got back together again, but he still wants to know why.

Pleasee Help!How do you ask your girlfriend why they broke up with you when yall are going out again?!?
Of course. If the two of them don't discuss why they broke up, how can they fix their problems and work to improve their relationship? They NEED to discuss why they broke up in detail. My boyfriend and I had a fight that led to a break up. We spent at least a few hours talking it out when we got back together. Especially for the person that was dumped, they need to 100% understand what happened so that they're not worried it will happen again. If they don't talk about the 'whys' they won't be able to improve their relationship.How do you ask your girlfriend why they broke up with you when yall are going out again?!?
I'm a guy and savearley heartbroken and whenever me and my ex get back together i try to ask this, but i learn to NOT ask it! Tell him to NOT ask this question, it embarassed the girl and makes her feel unloved. Some things are better to stay in the past,then to be brought up again.
I would tell him to ask his gf what he did wrong so he knows not to do it again-sounds sweet and concerned and that way he will know
He should ask her himself. It's legit for him to ask. But it's really weird for you to be asking unless you are close friends with the girlfriend. If you're not, don't ask her. Give him some tips on asking her.

Tell her that he's fine with everything, but that he wants to know what he did wrong last time that made them split. He can say that he wants to make sure he doesn't do it in the future. (and tell him to phrase it like he's in the wrong just in case he is)

Good luck