We do it without thinking: call out “Here, kitty” in a high-pitched voice. Both men and women will, for reasons we never analyze, pitch our voices an octave or so higher than normal when calling a cat.
The habit actually makes perfect sense, for the simple reason that cats’ ears are sensitive to higher-pitched sounds. Those hypersensitive ears are much more likely to respond to a soprano than a bass. (Then again, even after hearing you, they can still choose to ignore you.)