純水

正所謂婚姻就好似一間海水化淡廠，開始時會有雜質，仲好鹹，但漸漸你對對方嘅鹹會越嚟越淡，而你哋嘅愛情會好似啲處理過嘅水咁越嚟越純正，真喺飲得杯樂嫁！

Marriage is like a desalination plant, as time goes by, your sex life will become bland but your love for each other will be purified.