Having sex , dating another guy making out with some one?
Think that's it
Spending money on a shared bank account on drugs or gambling is worse than that.
Those things are all fun
Drugs are good
Sure but if you waste more than the other can earn, you're breaking a fundamental pillar in a relationship. I've got no problems with occasional drugs or gambling, but sustaining an addiction is cheating in my opinion.
That's not cheating that's just being a douche bag,
In my opinion
My wife knows I'll be more likely to divorce should she rack up debts than if she racks up affairs.
Anything that you do hoping your partner won't find out.
Breaking promises. Forcing promises which can't be kept. Making promises which you know you'll break. The moment you promise monogamy you're already cheating. Your partner is cheating because s/he forces a promise you'll never be able to keep.
Make promises ba
Anything that would make your SO unhappy that you did not talk to them about first.
Having cards hidden up your sleeve.!!!
Unless you're having a magic competition. Cheating is breaking of established rules. Those rules differ per couple and per game. It's wise to be clear and honest about the rules you're going to play by.
when you are not married it is fornication
having emotions for another or physically doing something with another in the process of you dating or being in a relationship with a person
Anything that you wouldn't want to tell your significant other about.
Anything you would only do for or with your boyfriend/girlfriend. with a person who is not.