Curiosity is its own reason.
This has been done elegantly by Minkowski; but chalk is cheaper than grey matter, and we will do it as it comes.
Only the one who does not question is safe from making a mistake.
Regarding sex education: no secrets!
In every true searcher of Nature there is a kind of religious reverence.
At the same time, as social beings, we are moved in the relations with our fellow beings by such feelings as sympathy, pride, hate, need for power, pity, and so on.