ELI5: Explain Like I'm 5

Thou shalt not commit adultery

Okay, so you know that when two people get married, they make a promise to each other to love and be faithful to each other forever, right?

Well, that promise means that they won't do anything that would hurt the other person or make them feel sad.

Now, one thing that could hurt the other person is if one of the people in the marriage goes and does something called adultery. Adultery is when someone is married but they go and have a romantic or intimate relationship with someone who is not their spouse.

This is not nice because it makes the other person feel very sad and angry. It can break up the marriage and hurt everyone involved.

So, when people say "Thou shalt not commit adultery," they mean that it is really important to keep your promise to your spouse and not do anything that would hurt them in this way. It's like a rule to help people stay true to their promises and keep their marriages happy and strong.