I could hear her going to the bathroom just now (thought she was asleep), so I shouted up 'are you ok?' - silence, I asked her 'what are you doing?', silence, I called her once again then went up. She looked a little embarrassed and said she'd been washing her hands. So when I asked her why she seemed embarrassed and I said don't be silly, tell me, to which she replied 'I've been sort of playing with my bottom'.
eeek. I just said 'why are you playing with your bottom you're meant to be asleep, try to go to sleep now it's late there's a good girl' 
She's just turned 7. Is this normal at this age? Younger I understand that they fiddle but I was a little bit taken aback
. Do I just let it be or do I mention something (it's not like she was doing it in public).