why he flipped to and fro between the 2nd ex and the last ex

[jsulley]

he never did UNDERSTAND why the last ex turned her back completely on him, in his own words.

he never got past the hurt which he felt was caused by her "sudden treatment".

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he told me the 2nd ex and last ex were "similar" in some aspects. the manner in which he broke up with the 2nd ex was probably "similar" to that of the last ex, causing him to relive the pain once again.

the break-up with the 2nd ex could have made a very deep imprint in his memory. so he jumped at it, projecting the past onto the present (last ex). check his logic and rationale - his pattern of thinking and coming to a conclusion probably have reference to the past experience. furthermore, he took advice from the 2nd ex and friends related to his past ! what "insightful and fresh" perspective could one hope to get seeking advice from the same old circle which caused him hurt in the first place ?

it's amazing how the human mind works especially when the "peeling of layers" is lacking. he is in a vicious cycle and he doesn't even know it.

[Adrie]

A lost mind. It may be difficult to straighten up his head again. If he wanted to, or if we even had the right to.

Him searching for advice from his ex isn't all a bad thing. He could get 'valuable' information on how his ex broke up with him. What their reasons were. And so he can use that to improve himself with his new relationship. But of course, I'm not saying this could work with every women. Most have different preferences and you'd have to remember the culture that this woman grew up in as well.
So using the advice from your past ex's wouldn't always work. She may like the man that he is right now. There are many possibilities.

I do wish this anonymous person luck. May he find some sort of happiness in his life.