Perhaps they have a city down there.

Suppose you were to go and get a bottle of champagne and see if Master Cupid and Miss Venus would like a drink.
We'll see then if our nectar is anything like theirs." Redgrave went below.

Meanwhile, for lack of other possible conversation, Zaidie began to sing the last verse of "Never Again." The melody almost exactly described the upward motion of the _Astronef_, and she could see that it was instantly understood, for when she had finished their two voices joined in an almost exact imitation of it.
When Redgrave brought up the wine and the glasses they looked at them without any sign of surprise.

The pop of the cork did not even make them look round.
"Evidently a semi-angelic people, living on nectar and ambrosia, with nectar very like our own," he said, as he filled the glasses.

"Perhaps you'd better give it to them.