Yeah, that's only not ok once it goes from dating to a relationship.
No, generally I don't date when I have a friends with benefits or something and vice versa. Now, I don't think that one or two dates means we're exclusive, until death does us part. But I won't be sleeping with anyone at all during this "playing the field" period. Nor will I sleep with more than one guy if I have a friend with benefits or "casual" partner (ONS aren't my thing).
One hundred percent, but I would bring up the fact that I'm still seeing other people early on so there are no surprises and she has the option to decide whether or not she is ok with that. She might decide she's not ok with it and she has a right to know. That's the only way you can honestly date and have sex with more than one girl at a time. The worst thing you can do is make all these girls think they're the only one. And you know when a girl has that idea in her head. She gives you girlfriend vibes
NO NO NO!!! WTF is wrong with people!!! Once you say "yes" to that first date you are now OFF LIMITS to everyone else!!! If you want to fuck someone else you should not be dating another person at the same time!