ADULTERY

adultery is defined as:

Voluntary sexual intercourse between a married person and a person who is not their spouse

Biblically:

  ^"But I tell you that anyone who looks at a woman lustfully has already committed adultery with her in his heart."~Matthew 5:28

^" I tell you that anyone who divorces his wife, except for sexual immorality, and marries another woman commits adultery."Matthew 19:9

“Anyone who divorces his wife and marries another woman commits adultery, and the man who marries a divorced woman commits adultery."~Luke 16:18

So,when one lusts after a woman they commit adultery(the woman is not theirs).
Secondly,when you divorce your wife for nothing concrete and marry someone else,you commit adultery.
Lastly,when you marry someone who has been divorced,you commit adultery still.

This just tells marriage isn't something you get into and then decide to just get out of it.May God help us as young people to seek His guidance so that we do not end up divorced,committing adultery or just part of miserable marriages.
Further one,God forbids adultery!