A. Never give in to self-righteousness, your own or other people's.
A. You don't want to know.
A. A drink before dinner on a perfect summer evening in my garden - or somewhere similar. "Perfect happiness" implies a permanent state of happiness, but it doesn't work like that. Happiness happens in moments. Often it takes you by surprise, but you have to be open to it and able to recognise it whan it creeps up on you. "Goodness me," you say to yourself in mild surprise, "I'm actually in this moment totally happy".
A. See above.
A. Cary Grant. Or maybe Mick Jagger. I can't stand his music, but, boy, he must have had a good time.