First Principle's Thinking

Have you ever wondered?

Why is the sound of a mosquito so annoying?
Why do we have two eyes and two ears instead of one or three?
Why does the right combination of salt, sugar, and fat taste so good?
Why is the core of a fruit often the sweetest?
Why are we afraid of the dark?
Why is mating extremely pleasurable?
Why are women generally warmer than men?
Why are men generally taller and stronger than women?
Why are women pickier than men in mate selection, while men tend to be the pursuers?
Why are the majority of prisoners men?
Why is a dog excited to see you, but not a cat?
What is ego?
What is consciousness?
What is intuition?
What are instincts?
What is the common pattern in food habits around the world? (e.g., sushi, pizza, burgers, dal roti, vada pav, chole bhature, dahi paratha, etc.)