Why do guys do this right before breaking up with a girl?

I saw a video on Facebook and it made me curious as to why guys do this?

https://www.facebook.com/share/r/1Dxrh9Mvtu/

In my perspective it doesn't really soften the blow nor does it alleviate the hurt and emotions a girl feels if you promise her many things. It breaks the trust that girls have in men when they are dating.

But I could be wrong - tell me your thoughts?
Why do guys do this right before breaking up with a girl?
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