Sex with other girls... She doesn't mind?

I'd say she was trying to justify her sleeping around on you, see if you do it them it's basically by mutual consent and you can't give her trouble about it.

If you love someone you don't want to share them with anyone for any reason. It will only cause problems if you do it.

Well, I have to say you have to be careful. She might be confident or whatever, but at the end it will hurt the relationship because it will get to her. My best friend told the same thing to her man and I always told her she will get hurt because if he does the deed it will bug her and now she understands what I meant. She keeps coming to me crying because she argues with her guy about that agreement. So just like I told my friend. That it does not work that way because no women like to see her guy sleeping or pleasing some other girl just like a guy would not like his Girlfriend sleeping with other guys. Got me.? Anyways. She probably didn't mind when she told you just like my friend but it will be a problem later.

She may be sincere. I've said similar things to my own boyfriend just because I don't feel that he (or I) should act differently then we usually would just because of our significant others. A significant other isn't there to control you, and if he's saying no just because of me. Well, I don't want that.

If she really is confident as you say, she might actually mean it. She has no insecurity about the idea because she knows you'll be coming back to her. My suggestion is not to do it just because she said it's OK - you said you aren't the type of guy to attempt something like this, so why bother just because you've been given 'permission'? However, if you're really wanting to try it, you obviously have her permission. There ARE girls who are honestly fine with this sort of thing.

Also, I'd make sure that she isn't applying the same principal to herself if you're uncomfortable with this. Tell her that you're fine if she doesn't want you to do it if she can't, but that you wouldn't be able to date someone who sleeps with other men.

I've heard other girls say they don't mind if their guys watch porn when they are not around, but that comment is pretty far out. There very well could be a hidden message in that statement. She could be "practicing" with other guys.

Watch her behavior and subtleties to understand what is she really thinking. Your suspicion could be right and she's just playing with you (or not). Hopefully you are right. Best of luck.