Thanks for that - I have a vulva! The Rock Art fraternity aren't interested. Remembering the Viz schoolboy edition I'd suggest it represented a young teenage person's. I think I'd have better luck promoting that fragment of a spiral built into the Manchester suburban garden wall ... At least he did come to look at it - though it took four years (4yrs.) of arranging to get him up the hill to it. (I think a few of the north France covered monuments have feet carvings too).