Confession from a Nurse

I've been engaged to my wonderful fiancé for over a year now. We've always had a solid and healthy relationship until recently when things started getting... different. As a nurse, I see all sorts of human experiences, but something shifted inside me when he introduced this new element into our dynamic, role-playing patients during sex. It's strange, but incredibly freeing. He takes on the role of my doctor in the most sensual ways, and it's not just pretend medicine; there's always an element of care involved too. I find myself both turned on and comforted by these sessions. I've shared this with a few trusted friends who think I'm crazy for finding such an unconventional kink exciting, but they also say it makes sense given my profession and background. What do you all think? Is there something wrong with me enjoying this so much? Should I talk to a therapist or is this just another side of human sexuality?