Thanks for your observation. My Mother's actions and motivation were discussed at length in therapy but the important thing is that I have never felt like I was a victim of anything 'sexual' in her behavior. I was aged between about 8 - 12 yo, it happened more than once but one occasion/one specific memory has stayed with me - it's dim now but when I first mentioned it in therapy the memory was very vivid - at the time I remember saying that 'I can still feel her touch'. Back then there were lots of home remedies for different ailments and, believe it or not garlic, coconut oil, shredded raw carrot, papaya, pumpkin seeds and wormwood are all mentioned as a home remedy for pinworms. Perhaps it was coconut oil that was rubbed in and around my **** but that's not part of my memory - maybe I should have taken it by mouth instead.
I agree, she may have been misinformed but I don't think she had a hidden agenda when she asked me to spread my buttocks.

Anyway, I hope to continue sharing my story, hopefully it all makes sense in the end.