Practically ALL THE TIME!! They may not understand the words but they know the tone of voice! Sometimes I tease them and in my sweetest voice, say something like "you are the nastiest brattiest creature I ever saw and you stink, too!" and they love it as much as the mushy talk
Now that is just the cutest thing! I can just hear you saying that.

I tell Grover all the time, and sometimes I just say '' Hi ugly, mommy loves you'', She just looks happy, hehehe. Of course I know my baby is NOT ugly!!

Willie