Why did my ex move on so quickly?

Of the ones I was able to talk to about it all rationally later, some of them admitted they “used” a new “hook up” the same way some people use drugs, to dull the upset over our breakup; some said (perhaps as revenge) that I was easy to replace; some said they just got lucky. Most didn’t stay with the quick replacement, but a few even “panic married” the replacement, as part of being upset about the breakup.

What I suspect you really want to know, is one or more specific questions.

Different tack: I don’t think you asked what you want to know, you asked what you’ve heard other people ask.

Ive been pretending to be okay and acting as normal as possible, but Im actually completely heartbroken after a recent breakup. Its painful and really affecting me, to the point where I cant concentrate at work, Ive lost my appetite, I cant sleep, and It feels as if my whole world has been turned upside down. I loved him so much. He said so many cruel things to me and it made me realize he must not have loved me the way I loved him, or he wouldnt have said such horrible things. How do I handle the heartbreak and why cant I accept that he didnt love me and just forget about him?

I know from my own “misadventures” in love, that my ex’s were able to move on quickly because they were more attractive than I am, and far less shy, and sometimes because they were far less picky than I am.

Such as, if your ex moved on fast because they never actually loved you;

and so on.

Why does it itch on my vulva, uterus, and sides of my vagina, but it doesn't itch inside the vagina?

or if they moved on fast because they can control their emotions like a simple light bulb;

or if they moved on quickly because they were secretly starting up with their current person before you broke up;