I don't mind the fishy and yum-yum and duckies stuff so much as the high pitch voices that usually goes with it. I figure ppl say horsie for the same reason they would say johnny to a little boy with the name John. Just making it "smaller" so kids can relate to it, kwim?? Eventualy kids will learn how to speak proper, so that's fine ...
but having to listen to a grown-up cooing in a high pitch voice gets me all the time. Espesially when it's a real small baby and ppl goes all gogo-gaga and stuff - flips me out each time. Can only imagine how scary for the kid