I love it when Mr Boo does that- falls asleep on the sofa i mean. It means i get the bed all to myself.
In the morning he'll whinge and say "why didn't you wake me to come to bed?" to which I always reply "I tried, you were well out of it", the silly sod still hasn't worked out i deliberately keep quiet so not to wake him.
when my son was 12 he was sitting beside me on the sofa and i had a felt tip in my hand so i decided to draw a smiley on his knee,when he was at school the following day they had to put there shorts on for p.e.and everyone was laughing at his smiley knee,