One thing I’ve learned working with a lot of people in this community - the intense sexual connection you’re describing happens with twin flames, but it can also happen with very strong soul connections or karmic partners if both people have clear chakras and activated kundalini. So the experience itself might not be exclusively twin flame and that’s one of the reasons people can get stuck with karmics for so long. They still feel important when it comes to the physical connection.
That said, what you’re describing about not wanting anyone else is a pretty major indicator. Twin flames create what’s called an unbreakable energy cord that maintains constant exchange between you. Your root and sacral chakras literally sync up with theirs. When you encounter other people, their energy signature just doesn’t match yours the way your twin’s does. It’s like trying to use the wrong key in a lock - technically, you could force it, but why would you when the right key exists?
Twin flame sexual energy isn’t just about pleasure or connection between two people. It’s there to trigger kundalini awakening, clear blockages in your chakra system, and push you toward spiritual evolution. When the pull feels overwhelming, that’s often because there’s shadow work or healing that needs to happen. The sexual energy is the catalyst that brings everything to the surface.