Monogamy: natural or not?

Girl's night got a little wild. A friend of mine - who is in a relationship - almost kissed a guy. When I say almost, I mean the guy was literally a few inches of her mouth ... I want to believe that she stopped for the right reason, if I wasn't around to pull her hand, the chances of her ending up in his  bed the next morning would have been pretty high. 

Laetitia did - I guess -  the right thing, and told her boyfriend. She claims she loves him and wants to make things work, and that's why she told him. He forgave her and they both agreed on working on the relationship. 

Now if you were the culprit, would you have come clean? I mean if there is no way for your significant other to know about your indiscretion, do you risk it all in the name of honesty or not? 

Or do you think sex can really be separated from love? 

I used to think of sex in a very romantic way - only with my husband, after our wedding, and voila. I changed. I had sex before marriage. I had sex without being in love. I even had one night stands - not many - but still, I did. I used to believe in monogamy as well, but now I wonder ... Is monogamy natural?

I read a bunch of articles - some feel really bad about cheating, some don't ... some felt no guilt whatsoever -- is it because they didn't really love their partner? Or is life just complicated and very gray, with no white or black answers to every question ...

BOYS: true or false?