Paulette - who is RS please?
Vertical, my husband (HWMBO - He Who Must Be Obeyed haha!) is the same - he saw me doing middle splits with my feet on the wall once, and said that I would leave marks - so now I wear socks when I do that stretch.
MemphisKitten - I don't think it's anything to do with age, particularly. I did contortion when I was about 10-11 years old, and could do the front splits, and lie on my stomach with my feet tucked under my chin. That was over 40 years ago, and when I started doing flex classes again, about 2 years ago, I was more flexible than most of the girls half my age in the class.
I think flexibility may be, at least in part, hereditary (anyone else have a view on this?) My Mum, at 85, is more flexible than some of the girls in their 20s/early 30s in the flex classes I go to! I am now 57 and am maybe 2" off the floor in the front splits. Middle splits, however, is a different story! I think some people have front splits flexibility, and others have middle splits flexibility, but not necessarily both. My friend who is 44 is closer to her middle splits than I am, but much further off in front splits. Maybe it's to do with the way our bodies are built - I don't know.