My Secret Kink and My Partner

I've been with my partner for five years now. We're very compatible in every way, except when it comes to this one thing that I've always wanted to explore but haven't mustered the courage to bring up yet. It's a kink involving roleplaying as different characters, sometimes even fantastical beings like mythical creatures or princesses. The idea of donning a costume and embodying someone else while we're intimate has always intrigued me, but every time I consider suggesting it, my heart races with fear that she might think less of me for having such an unconventional desire. It's not just about the costumes; there’s something thrilling about stepping out of reality, even if just for a moment. It's a way to escape and feel uninhibited, but at the same time, I worry it could be too much or too little, how can anyone know what turns them on until they try? Tonight was different though. We were watching some fantasy movies together, and one scene sparked this longing inside me again. As I watched her face light up with excitement over these films, something clicked. I have to talk about it, or it might eat away at our relationship like a secret cancer.