Splat n Dexter
Junior Guinea Pig
You have your old decorating clothes on when he arrives home, stuff in the bathroom, and say how you were going to get started but the phone kept ringing, and people came to the door etc., then suggest whilst you cook a lovely tea he could get an hour's decorating in.x
Then you revert to Rice pudding and M & S tips whilst he is not looking! ha ha
LOL.

Oh to have a devious mind like yours!
I remember girls at a place I worked at used to run a damp cloth with dettol on it along the radiator before the boss would land in. She fell for it and thought they'd been very busy cleaning up every time!
My tip (not as much fun I'm afraid):
If you can't get a bottle or jar opened put on a rubbe glove to get some grip.
A rubber glove is also great to run along clothes etc to gather up any hair/fur on them.