Why does my romantic interest fade when physical intimacy enters the picture?

I've been in a few relationships where I felt a strong emotional and romantic connection with my partner, but as soon as things started to get physical, my attraction seemed to disappear or get really complicated. It's like my brain and body are on different pages. I've tried to just push through it, thinking maybe I just needed to get more comfortable, but it keeps happening. This has made me wonder if my experience fits into any particular identity or if it's just a personal quirk. I'm not sure if I'm asexual, aromantic, or something else entirely because I do want closeness and companionship, but the physical side often feels overwhelming or turns me off. Has anyone else dealt with romantic feelings that don't quite translate into physical attraction? How do you make sense of that without feeling like you have to fit into a strict label? What helped you feel more at peace with your own experience?