Ed blinks, then replies, "Probably didn't get this across, but the implied secondary question was how a fortress could be alive in the first place." Ed has apparently never heard of the concept of a Genius Loci—though the phrase may not apply to the Fortress of Solitude anyway.

It's not that there's anything wrong with it, it's just that Ed feels embarrassed when talking about things related to sex in general. At any rate, the message part piques Kat's interest, and she asks, "What was the message? If you don't mind sharing."