It is true for all, no matter how beautiful - someone, somewhere is tired of that person's crud.

[edit: this is true for all sexes but I guess the unkind reader will think beautiful doesn't apply to guys]

Some studies suggest we date people of compete able attractiveness. Whoever he was dating was most likely as good looking as him and would not consider it a blessing to stay with him.

Plenty of people that are attractive and good (or at least non-jerks) that get broken up with. They don't necessarily have to be a jerk, just not a good match for their partner. Politics, views on marriage, mismatched libido, kids, etc.

I dated someone once who was really great, did everything right, perfect on paper. However we broke up because I just didn't feel anything, there was no chemistry and sex was boring and lifeless. Sometimes that happens and its nobody's fault.

Sure, but presumably there would be a pattern of rising stress levels leading to the event. This looks like a square wave, which indicates an instantaneous change from one state of stress to another, which would indicate he was the party receiving the bad news.

> You'd be surprised how stressful it is to break up with someone.

I'm human and 45, I'm really not surprised, but I'll play the odds on who did what to whom.

Be careful making blanket statements about things you can't possibly know. I've had breakups that were unmitigated relief, due to my having horrible taste.