They might have not been sexual per se. They can clearly be interpreted as sexual power games by your adult self, but if you think of it sexuality you may agree that sexuality is just another expression of a personality. It does not magically appear with no connection to prior life. Where do sexual perversions often orginate? Way, way earlier than the actual hormonal changes start and sexual wareness starts.

So, to me those dreams were imaginative replay of power play between parents and child. Child IS crawling, IS begging, IS totally dependent. There is a beautiful sense of security in being so controlled and also a sense of fear. If you think young children do not have any awareness of being controlled what about the "terrible two's", where the whole point of the child seems to be to oppose that control.

If, despite your warning that you are not looking for advice, you may be interested in a way to clear up the tension these memories of dreams and BDSM associations cause, there is something I could sugguest. In a PM.