I also want to mention that when I was heavily into witchcraft I dated several women who had experienced a dark figure in their dreams. They all described him as the same individual with a hat and long hair.

The coven I was involved in at the time was mostly comprised of women and ALL of the women described this man and claimed to have dreams about him, and at least one of the men (not me) claimed to have seen him as well.

I've experienced both sides of the religious spectrum (as far as Christians are concerned), and I have had the unique opportunity to observe all sorts of paranormal phenomenon from both sides of the spectrum.

I can tell you that there are "other beings" out there for absolute certain (as real as any of us) that you can sense with your actual 5 senses, without drugs, and without trances or anything of the sort. Not just that, but that others can experience them at the exact same time as you, in the the exact same way.

I don't know if they are demons, but I am certain that the description of demons and angels fits into the description of other entities I have encountered, though never during sleep paralysis.

I am currently floating two possibilities, one being that there is an interdimension or extradimension commonly called the spiritual which is inhabited by "other beings", and the other being that we are dealing with metamorphosis that also deals with other dimensions. Human beings might actual be a stage in this metamorphosis or not. If so, it might explain the interest in our health and reproduction that these entities have. Also, the greys could be considered nymphs. This metamorphosis could be an extremely long process, much like a periodic cicada. Such a phenomenon could be something that takes place every so many thousands of years or so after the nymphs are awakened by electromagnetic or heat phenomenon (would explain why the a-bomb explosion increased sightings and why aerosols are being sprayed in the atmosphere to heat the planet).

Another note of interest would be that metamorphisis would explain shapeshifting and also the funny descriptions of angelic beings that have wings and faces of bulls and men, etc. Also would explain Revelation Chapter 9 and the locusts. I don't know where I'm going with this second theory, it's actually a new thought that I am toying with, but that's not what your thread is about, so I'll just stop there.