rose you needn't ask forgiveness because your question is more interesting than my original one was i think so!
sometimes i can control my dreams. oftentimes, it is a "get-out mechanism"... which is, i will see a set of stairs (never spiral; always leading downward). then i know that it is a dream, also i want to escape the dream, and also that all i have to do to escape the dream is to run full-pelt, far too fast down the stairs. on occasion, i will recognise the dream or the dream place from previous dreams, and then i know it's a dream, but it sometimes may continue, although knowing it's a dream does tend to nudge it toward the end.
on rare occasions, i have tasted, smelt, and physically felt, inside of dreams, stuff which just couldn't be there in the real world when i was dreaming (you know; like... i know i wasn't eating my pillow, etc). whilst deprived of sleep, i once was playing the piano, and fell asleep, and had a full dream, and woke up, still playing the piano. that was weird! also, when i was younger, i used to sometimes get things happen to me when on the brink of sleep - these "things"... what they were was, i would be just nodding off, and have some section or other of sound stuck in my head. the sound would build and build until it reached a sudden loud volume (not too loud, though) and then (and this really was very loud) an effect would happen to me through my eyes watching it, my ears hearing it, and me feeling it, like i was a television set, and was being switched off, you know - like the spark and then into a black screen, that same noise... big pulse of electricity through me... to this day i don't know what in the blue hell those things were.
beth... i am envious of your dream-re-entering thing... that is one thing i have many times tried but never once been able to achieve.