When I was younger, I fully believed that there was no black or white areas when it came to cheating. I didn't think the "once a cheater, always a cheater" quote was true, and I felt like some things could be perceived differently by two other people. But now that I'm older (and have been cheated on more than once), I believe that there are some acts that are definitely considered cheating in a relationship.
Maybe it's because I've been burned, but I'm now of the mindset that there is no excuse for cheating. People can say they are unhappy, that their partner drove them to it, or that they had no control over themselves, but I won't buy it. It's this simple to me — if you want out of a relationship, then just leave. Don't pretend to be happy while cheating. Don't argue that if your partner had done this or that, you wouldn't have strayed. There's literally no excuse for it. And when you add in all of the "gray" areas of cheating, it p*sses me off even more. Just because you're not having full-on sex with someone else doesn't mean you aren't cheating.
And, in the same vein, there are some things that aren't considered cheating. We're allowed to have attractive friends of the same sex we're attracted to. It's not cheating to go out to a bar without your SO and get drunk on a Friday night. But exchanging numbers with a person at that bar and pretending like you're single? That most definitely is cheating, along with these 11 things. If you find your partner doing these things or you yourself are caught in a few of the acts, it's time to reevaluate your relationship and get over your cheating self already.