Brooker: ...Susan, I have to ask: do your cats have Facebook accounts?
Calman: No!
Brooker: Oh, right, because that would be ridiculous.
Calman: They don't have thumbs.

Now I'm wondering if Charlie Brooker actually knows about Catbook and Dogbook. (Facebook features where dog and cat owners can post their pets. My sister-in-law has Dogbook where she posts dog pictures and things.)