He has gone back to his cheating ex by virtue of his love for her, finally giving in to the emotions he had been suppressing from his past breakup with her.

This is one of the most common reasons why someone goes back to an ex.

I get that it makes no sense to an extent.

Why go back to someone that performed the ultimate betrayal of cheating?

Why would someone do such a thing and put themselves right back into an uncertain situation?

Love makes people irrational.

It makes a person believe something that makes no real rational sense.

When a person loves, they have so much dopamine reacting in their brain.

Dopamine is a neurotransmitter in the brain that causes euphoria.

When the brain connects this euphoric feeling to the rest of the body, it’s exceedingly hard to ignore.

It is like a powerful and addicting drug taking over your entire being.

When he thinks about his ex, the first thing that comes into his mind is not the fact that she cheated.

No.

On the contrary, the first thing he encounters is that euphoric feeling.

The thought of this ex sets off that chemical reaction in his body.

Like a drug addict he becomes attached to that amazing feeling and he wants to experience it over and over again.

He is not thinking about the cheating, he is thinking about how good he is feeling.

The cheating then becomes an afterthought that is filled with illogical justification.

He tells himself that he was at fault for the cheating, as he didn’t give her the attention she deserved while they were dating.

He tells himself that she has changed.

She made a mistake and won’t do it again.

He blames the person that she cheated with, convincing himself that the person was such a sleaze and was adept at tempting his poor ex-girlfriend.

He has now painted his ex-girlfriend as a victim.

A victim of a relationship crime she perpetrated?

Makes no sense right?

Unfortunately, this is how the brain works when a person is still desperately in love with someone else even when that person cheated on them.

He has never found someone else that affected him like his ex did.

He has dated since then and yet no one ever seems to get him to that level.

There is invariably something missing, whether it be excitement, intrigue, adventure or just having someone in his life that gets him.

He has never encountered that since he stopped dating his ex.

Perhaps he has been looking for it and failed.

He decides to give his ex another go, given that he hasn’t found someone else who meets his emotional needs the way she does.

When she is exceptionally good with persuasion, it’s likelier she appeals to his sense of lacking.

This entices him further to go back to her.