I have very pale blonde hair and it's beautiful. Even as a man my long ponytail, beautiful!
:) i have only black hair
You should dye it. So many blonde colors to choose from, reddish strawberry blonde to golden-brownish sandy blonde color. 
how common is the color blonde
Not as common as black hair. The term Blonde has been around since 1481.
where the word blonde come from, France?
Yes, it's an old French word. It means a color midway between golden and light chestnut. 
so any light hair color is considered blonde
Depends on who you think coined the term. In medieval Latin "blundus" or blonde means yellow. 
so do blondes have more fun?