I like walls.

Just now I saw an advert for Windows in the Times. Leaving apart the question of why on earth Microsoft has to advertise, I'm not sure that "Windows. Life without walls." is the best strapline.

I can't remember who first said it, but:

In a world without walls, who needs windows and gates?

Besides, what's wrong with walls? I like walls. The walls of my house, for instance. Without them I would be cold, and I would have no things. And probably lots of viruses.