Is once a cheater always a cheater?

The guy will probably do it again.

Yes once a cheater always a cheater. Leapards dont change their spots & humans dont change their personalities.

depends on too many factors to be one single answer for every situation

Once a cheater, I'll never trust you again.

You won't know until you know. But they always say, past behavior is a good indication of future behavior.

Generally, I would expect him to cheat again - but, there are always exceptions. Rare, but some.

no, someone shouldn't be defined by the mistakes they made. im a big believer in second chances.

id like to add though.. it takes both partners to restore the trust. if the cheater has apologized and said they won't do it again, the victim needs to make a decision if they can trust the other partner or not. a healthy relationship is not checking the other person's emails, text messages & phone calls, questioning their every move. it takes a "leap and the net will appear" approach. the relationship can actually grow stronger.

No I dont believe so...cheating is a result of an underlying issue. Weather is be your not getting something out of the relationship your in and looking somewhere else, your bored with the same ole thing and maybe just spicing up the relationship would fix it. You dont really want to be with the person your with. You have a drinking problem....if thats generally when you cheat. There are so many factors to think about, it just really depends of the situation and the people involved.

No.

Each and every person who chooses to cheat has a reason for doing so. In most (not all but most) cases, the reasons usually break down to this: Not being happy,fulfill, or satisfied with themselves &/ or their relationship (usually a combo of both... the reasons they are unhappy/unsatisified or unfulfilled may vary, but those are the base feelings). Those underlying reasons determine the likelyhood of a person cheating again. If those reasons are addressed and rectified and the person becomes someone who is happy with themselves and their relationship, they most likely will not cheat again.

Also, no one reacts to situations the same way every single time they encounter them. So, it's impossible to determine what choice a person will make in any given situation, until they actually make it.