Jill, is that the little sound they make, that makes you think they're dead interested in what you said? It's hard to describe, but stay with me here....
If you said to me, "you won't believe it, but mary has been having an affair with stan, while her ted is in the hospital" And I'd go "oooooooh" like, that's interesting! Is that the sound? Cos Alfie does that all the time and it's the cutest little sound - I've been trying to catch it of vid for ages to ask if every grey does it!