Our patio door has been sticking on its runners and it was very difficult to open and close it. Yesterday I got it fixed and it is now flying open. Geoffrey was out for the day doing his extra bit. I was sorely tempted to keep quiet and sit back and watch him discovering our "new" door but realised that if he tackled it as we have been doing it might get damaged - so I was a good girl and told him before he opened it!
Sense comes with age!