French:

A beautiful man:

Un <= masculin (A)

Homme <= masculin (Man)

So the adjective should be masculine, right?

But as homme 1) starts with a H and the word does not have nordic descent, it’s not the masculine ‘beaux’ but feminine :

Un bel homme.

But not belle eh, just bel (they obviously sound exactly the same).

Because, it sounds better.

Which language was stupid now again?

It’s crazy humanity can communicate at all.