When to use the partitive article when talking about general things?

Question

It looks like sometimes you use the partitive article 'des' even when referring to general things, for example:
Le vin blanc me donne des maux de tête.
or the following sentence from an exercise: 'J'étudierais un sujet qui me plaît, en rencontrant des gens intéressants
Can someone explain this please?

Accepted Answer

Hi Madeleine,
Thank you for your very interesting question and I will try and answer it.
In French for generalities you imply that it is almost a fact as in,
'Les enfants aiment le chocolat et les bonbons.'
It is not true of every child but of most of them.
I think you have to use the partitive in the two examples you give because: 
 'white wine clearly give you (some/a) headache'
In the second example 'you will meet (some) interesting people while studying...'
You might say: ' J'aime les gens intéressants'  in that case it is all of the people under that genus.
It is so instinctive it's quite hard to explain...
Hope it helps!