The Reason of Living

Why do you have lunch everyday? Because you are hungry or just feel you need to eat?

Why are you going to sleep on time every night? Because you are sleepy or just feel you need to live a regular and healthy life?

Why are you getting married with someone? Because he/ she is your beloved in your entire life or you just feel you are not younger anymore and willing to compromise?

It is so difficult to reply to the question — What is the meaning of your life? I cannot just condense the answer to a few words or a sentence. Probably it is the reason I am living for.