My twin and I experience this just about any time we are connected and not distracted. This even happened when we were living 1400 miles apart, trying desperately to be together.
Now, this can happen when we are sitting together and just looking into each other’s eyes. As a matter of fact, as I write this, I am pretty sure it is happening, even though he is at work, and I am sitting here typing this as I homeschool my kids. The more you practice, the better you get. And practice is fun.
NOW, the BEST is, of course, during intimacy. And when I say the best, I mean, it is like NOTHING you have ever experienced before. We have had many times where we truly get lost in knowing which of us we are. I know that sounds totally crazy, but it happens. The more amazing is when we become what we call the Us. Which, ideally, we remain as all the time. That’s true merging. When we do not maintain this, life is not as bright. It is hard to describe this without drawing some diagrams for you, because it truly seems complicated. And words just fail.
Original post on Quora.