Marianne
Out of Body Experience:
Your dream is taking you beyond the mundane world, to a world of astral travelling. Dream Types on our web-site says:
Out-of-body experiences are when the dreamer's spirit leaves the physical body; some talk of a silver umbilical cord which connects us to our spirit bodies
With your flying, It seems like you had made a rule which was appropriate at the time, which was to keep safe and not to talk about it. Over time you mastered your ability to fly and didn't pass the technique on to anyone else.
In a past life you more than likely, didn't pass it on to somebody when you had the opportunity to. You are taking yourself out of the limits of the student to be come a teacher yourself. Pass the wisdom on.