Needs to be damaged
Contents insurance also usually covers:
your legal liability as occupier of the house, eg if a visitor has an accident and injures themselves
cost of accommodation and storage if you can't live in your home because of damage (e.g. fire, flooding etc)
some accidental damage to stereo equipment, TVs, computers, DVD players and any glass in furniture (e.g. a glass tabletop)
replacement keys and locks, and locksmith's fees if you lose or damage your keys
damage to TV and radio aerials, and satellite dishes
loss of food if a freezer breaks down
theft of cash from your home
contents of your outbuildings (although the amount of cover varies a lot from policy to policy and there may be lower limits for theft).