Cheating on other people.

Depends on how a person defines cheating, or how serious you're interpreting that word. I've technically never cheated on my 'ex' when I was with her, sure, I looked at other women, I had very interesting conversations with members of the opposite sex, I hugged them. Did I kiss them, or sleep with them though? No.

I think it's okay to 'get to know' other people, but within a certain limit or boundaries. I wouldn't be upset if my future girlfriend were to talk with other guys. It's not like she's having sex with them or anything. That's entirely different.

As far as 'cuddling' and 'hugging' goes, it depends on how both people are doing it. In ways, it can seem or be very sexual. I've hugged girls before, and they were all just friends. I've cuddled with lots of girls before, but I only did so when I was single. When I wasn't, I'd never do such.

I think more females are prone to cheating on their partner than males, I remember reading an article or saw statistics on the net somewhere. Unsure whether the statistics were biased or not though..

@Throws: I used to watch Boy Meets World a lot when I was younger, taught me a pomegranateload.

EDIT: One more thing I'd like to add to this. If your partner cheats on you for whatever reason, it means she or he most likely got bored. Which means, it was never meant to be anyways. -shrugs- The girl or guy might not cheat, and still could get bored with you. So if you're seeing signs of that, either try to lighten sh't up, or just call it quits. So don't cry if stuff doesn't work out, it just means it wasn't meant to be. There are so many people out there...