I know this might not be the best place to ask this, but does 'staart' have the same colloquial meaning it's German counterpart 'Schwanz' which can also refer to a man's penis?
Thank you. I'm not trying to perv everyone out, I was just curious.
You would never say "Cat is a social animal." Or, "I like to drive car." The singular thing is only true of man that I can think of, unless you're talking about meat. "I like to eat cat."
You could of course say "A cat has a tail." But in this case what you're trying to say is that if I pick any random cat it'll have a tail. Which is functionally equivalent to cats have tails (meaning all cats have tails), but it sounds funny and no one really says this unless you're speaking to a child.
Anyway I wouldn't say it's common at all. I'd say we usually use the plural to talk about classes.