I used to go to Rupert's when I was around 19 and it was in the days of Shalimar and it was in the days of mini skirts and ankle boots. 

I came downstairs ready to go out. Dad said "where do you think you're going dressed like that? Get back upstairs and put something decent on. So I did but put my "naughty clothes" in a bag and went round to Gilly's where I got changed and went out anyway.

I'm sure he was none the wiser ha ha