That sounds really fucking awesome.
Showing the same sex scene from two points of view has a lot of possibilities. What differs, what stays the same. I don't even think you'd need to label each section with whose point of view it is. Let the reader figure it out.
Elmore Leonard (a criminally underrated writer) was a master at effortlessly jumping from one POV to another, with no break other than a new paragraph. So good you don't even notice what he's doing. Third person instead of first person, but worth studying. I've read most of his early stuff twice, just trying to figure out his tricks.
Thanks I will check is work out,maybe I can adapt to a style like that.
It is easier to make it work in third person, I think. First person with a shifting narrator can get confusing unless it's "diary style" with an heading at each shift in narrator or each narrator is in a different chapter. When done well, it's great, but it is hard to do well compared to third person with a shifting point of view.
If done reasonably well, there's nothing that speaks against it. While it's mostly describing the same continous settings, the collaboration story in my sig (A Teutonic Temptation) switches between first person narrators too, so feel free to take a look ;)
What KatieElizabeth and I did there was to add a small "hook" in every POV part that the other writer could pick up in the next part to make it appear seamless. It's always good to remind the reader that they're in fact still reading the same story and to keep them from wondering, "What the heck has this got to do with what I read earlier?" In our collab, with just two characters who interact with each other, this was of course easier than when more people in different settings are involved, but adding and using that kind of hooks can be a lot of fun in itself.
Make sure its done well! I read (and enjoyed!) a story recently published on this site that arbitrarily jumped between the two main characters. It was distracting.
That being said, I have a work in progress that jumps between four characters. There are sections I didn't like because 1) I didn't like how it read when I forced that first person perspective and 2) I didn't feel like the reader was going to follow who the current 'I, he, she, him or her' was.
I have most of it readable (in my opinion) because I force the perspective when I describe who is thinking thoughts, and then fall back to story telling when there is action.
I have used that style on a few stories. I don't use chapters as in Chapter 1. What I do is I give each character a chapter using his or hers name. If you read my story Deepthroat you can see how I did it.