Spend some time reading through the tbd posts. Some folks find it very easy to separate sex from LTR and deep comittment. Others find it impossible. I don't think either is wrong - the trick is to find out where you fit on the continuum and to be true to that place. Then you need to find out where any potential partner might be on that same (and many other) issues.
I don't think it's a venus/mars thing, but then I don't really think anything is a venus/mars thing. I think that each of us as individuals has a different comfort level. At times, we want to experiment and see if we can push that level, but we should never feel like we have to do that or that someone else gets to deicide when we do it.
Sometimes we also behave "as if." That is if we're trying out new behavior or a new way of being, we try and behave as if we believe a different way. This is fine as long as you understand that it is an experiment. Don't behave as if you can be sexual without being serious if you know that's really not you. OTOT, you may want to behave as if you're not so serious about this guy as a way to help you take things more slowly.
Acronyms aside, LTRs are LONG TERM relationships - they have to be long term. What you have before lots of time has elapsed is a potential LTR - those are pretty exciting. But until you've been together for some time, you have no way of knowing how it will go over time.
Bardbury's right about how we'd behave it we listened to our intellect. Aren't we lucky that we're made up of more than intellect? Enjoy getting to know this guy and I hope he turns out to be the right one for you long term
