Did you have any ideas?  I didn’t, probably because I thought about the object rather than its use.  Great design is often about solving problems.  From the “I wish I had thought of that” file is this mattress from Mehdi Motjabavi.  The sections in the Cuddle mattress solve the dead arm in bed issue by creating the space the cuddling arm needs to avoid getting squashed – simple and effective.  Motjabavi has been unsuccessful so far in getting funding to productionise this – surely it’s just a matter of time.