[Heizou looks immensely pleased with himself at this confession (so to speak), leaning back with bright eyes and a huge grin.]

Oho~! In that case, I'm honored to be one of the first~ [He can guess that other people Aether knows may have figured it out, considering he just walks around sporting hickeys on his neck and Childe... is Childe.] I suppose congratulations are in order, so- Congratulations!

But I'm surprised you don't know what he was looking for. He made it sound like you liked the way the purple-wrapped ones affected him the most!