Hey hey,
It's great you find relieve through dancing.
Many people do, of all genders, regardless of the style of dancing.
If this is the only thing that you feel is feminine about you, then I'd say don't worry. Men are perfectly capable of enjoying and partaking in sensual and erotic dance styles. The association with femininity is incorrect in itself. A lot of cis-women actually do not enjoy that type of dancing as it may be considered humiliating or downgrading to them. Even in other dances, men also show off their curves. It's not strange at all to like this.
If there are more parts about you that feel don't belong to your gender identity (if you feel dysphoria about your biological assigned gender's genitals for example), then you can start looking at reasons for that. It's important to remember you're not necessarily gay or trans when you struggle with this type of thing. There are a lot of other reasons which are much easier and less costly to resolve so be very honest with yourself and any professional helping you!
The possession you describe warrants some looking into. What do you mean when you say that? Do you mean you don't feel like yourself when you do it or perhaps that you're enraptured by the moment so you lose track of all else? Something else? To me it sounds like you're just caught up in the moment which, again, is totally fine.
Hope this helps you feel a bit less like you need to hide.
~ Grey