Since when and why spouse started to cheat on and how it can be stopped?

You may not like the answer, but there is no way to stop a cheater. Its a fact that once a cheater, there is always that possibility he or she will cheat again. It may not have anything to do with you, but in the mind of the cheater they need that extra thrill for whatever reason. Some men may feel it is their duty to conquer women and add notches to their belt, which makes them a man. Some women do it because they have a man's mentality or they themselves want to add notches to their belt.

The only legal way to stop a cheater from cheating on you is if you are married and get a divorce. If your just dating, kick them to the curb, you are not attached to them in any shape or form. Move on and find someone who wants to be in a committed relationship. For your emotional and mental mindset, your best bet is to get out of the relationship and learn from this obstacle in your life.

a cheat will never stop cheating,it is in their blood.so divorce is better for long term happiness

regarding moral- a person with moral values will never do that.also in this world who is listening to elders or parents.