Yet, -how can something feel so good when you don't know what it was?
So if you had a label for it then there would be no confusion?
We encounter the unknown all the time. Everything we percieve was at one time the unkown to us. We learnt descriptions of it all as we grew up. We learnt to label things such as mum ,dad, tree, fire, ice cream etc etc. Some of these things also give us pleasure. They gave us pleasure before we learnt the labels for them.
What happened in your dream is simple. You are like a child again experiencing a place that you havn't learnt the labels for.
Knowing the label of something can ease the minds anxiety to have everything explained. However your reaction to what happens ie pleasure pain indifference happens way before the label kicks in.
Just remember though that the process you start learning by as a child was naieve. The moon was made of cheese and father xmas brings you presents. The first labels you learn about experiences like this are likely to be the equivalent. They will be childlike fantasies and stories talking about a world that is infinitely more complex and mysterious than cheese moons.
Such are the things like 'demons' and 'pacts'. These are childlike stories from elsewhere that you are trying to explain it with. In reality you just stumbled into the playground at junior school.