Does being able to go out and pull/sleep with other people really give you more freedom though?

In my relationships I've always gone on girls nights out and most of my really good friends are males but I've always tried to be really sure that whoever I'm with knows what values I have and that I would never do anything physical with anyone. Surely if that guy is going to be something more than just a really good friend I should be upfront with the guy I'm with because they've probably already surpassed him in my affections by that stage?

If all we're talking about is satisfying yourself physically, which is what it really comes down to, I don't really understand why that can't be done with one person, there's role play, new things to learn etc...Plus if it was him sleeping with someone else and I really cared about him I'd be sooooo jealous it would eat me up & it would be the end of the relationship anyway.