Anakin didn't find it so surprising that Kay was expressing expression and emotion - just in how people like he (Anakin was pretty sure 'he' having heard Kay talk some now) was doing it. Too often people didn't want Droids to so closely remind people of well. Other people.

More the pity, Anakin's closest friends had always been Droids.

"I haven't seen any around Coruscant or other places I've traveled with Master Obi-Wan." Anakin stepped back, then walked around Kay, studying him. "You're quite something."