I'm a bit of a stickler for correct grammar usage, and I once even had a small business doing proofreading and copy editing.  Sometimes I wonder why people are so bad at using English correctly, and then I think of things like the following:

When you have a number of distinct items (flowers, for example), and you take some of those items away, you have fewer items.

When you have a quantity of something (like water), you have less of that something.

So you have fewer flowers, and less water.

So, if you increase the number of flowers,  why don't you have manier flowers?!?

English is screwed up.