I don't think tea counts as caffeine.
If it does, then yeah, I drank caffeine yesterday. If not, then I didn't. Trying not to drink any today. I'm very sleepy though, and most tempted by thoughts of naps. Naps are civilised.
Cats nap. They seem quite civilised.
Except, of course, when they lick their butts. And cough up hairballs.
Otherwise though, very civilised.