1. Never
Have you ever heard of a heart? Well, your heart is an organ and without it, you would not be alive. In your heart, you have feelings. This means that other people have feelings and you have some control over how you make them feel. Why would you want to make your "significant other" feel not good enough or bad about themselves since you felt the need to not value their feelings or your relationship? The answer is never.
2. No distance can justify cheating
In our day and age, long distance relationships are extremely common. Some of us go away to college and have to leave our relationship at home, but that does not mean you can do whatever you want while your "significant other" is away. If you think cheating is OK while your boyfriend/girlfriend is not in the same zip code as you, then you do not respect your relationship. Distance means nothing when someone means so much. You can make a long distance relationship work. You have to put in the time, effort, and be creative on how to keep your relationship alive and strong.
3. Justin Bieber was wrong when he said "never say never"
It is never OK to cheat on someone just because you met someone else. If you are willing to give up your relationship and ruin what you have for someone you want temporarily, then break up. It is selfish of you to keep your boyfriend/girlfriend around while you have someone else on your mind. If you met someone else, then don't you think it is fair to let your significant other go, so they can meet someone else too?
4. Not ever, at no time, not at any time, not once
There are many forms of cheating and none of them are acceptable. I think with our generation, we forget that texting someone besides your boyfriend/girlfriend too friendly or flirtatious is a form of cheating. If you would not want your boyfriend/girlfriend reading a message you sent on your phone to someone else, then don't send it. That simple. If someone sends you a message that is not appropriate, then put that person in check. That simple. You are capable of telling someone that you are taken and they should not be talking to you like that. I know you would not want to look at your significant other's phone and seeing a flirty text that did not come from you.
5. Sorry, Hunny, but still never
People who do not see the flaws in cheating in a relationship have issues within him/herself. They are never satisfied with what they have. They cannot see the good things they have right in front of them. If you are this person, then don't be in a relationship until you are ready for one. If you are supposedly in love with your boyfriend/girlfriend, then cheating should never even be an option or come to your mind. If it does come to your mind, then was it even "love" to begin with? Love is more than lust. Don't risk the love of a lifetime over a selfish act that could have been prevented.