[More literal than metaphor? That means he wants to be older, which he's jokingly alluded to before, but Willow hadn't thought--

Wait, question. She thinks that over, suddenly uncertain and remembering what Giles had told them about Glory.] Gods are super powerful immortal beings from other dimensions? [she says hazily.] Some of them were on Earth for a while and got some worshipers, some have worshipers in their home dimension.

What am I missing?