Originally Posted by nycindie
You make it sound as if having sex with these other people just happens to you. "It felt so natural... we just wound up doing it, what's wrong with that?" Just thinking sexual thoughts about an old friend doesn't need to mean that you will follow up on those thoughts. "I didn't think I desired anyone else, but then I did!" Whoops! Attractions don't always need to be acted upon sexually. I am sure you know that.
What does having sex with someone you've known for a few weeks/months give you vs a multi year relationship? I don't know how people can so easily wrong their supposed loved ones.
If it's too hard for you to be honest and committed with people you love I don't see how adding more people into the mix (polyamory) is a good idea at all. It's very predatory really.