Happiness is inertia and two bathrooms | Brief letters

Marriage advice | Pity Thames Water customers | The slimming effect of greyhounds | Growing to love art | Bored by bridgeWhen asked about the secret of their long marriage, my parents’ answer is “inertia and two bathrooms” (Pass notes, 17 March). They celebrated their 66th wedding anniversary last week.
Emma Woolf
Birmingham• Re your article (Thames Water on TV: pity the staff, this place is decrepit, 16 March), having recently had a water bill from Thames Water asking us