How to understand our desires?

I have had these kinds of desires in me for a long time. I would say wanting to be tied up and feel out of control of my body for a few moments. I think about it quite regularly and it is quite intense. I have never realized it, because it scares me, and I have always had trouble assuming it. In fact, it bothers me to have desires whose meaning I do not understand. I do not know if I will end up finding the opportunity to realize it (would I feel better afterwards or not?), if it will pass naturally, or if I need to be able to explain it. Is this normal?

THANKS