I have concluded that there are at least two things that can turn a a mature, self-sufficient, cool and collected adult into a babbling idiot. They are:
1. Babies, because what do we do when we see one? We start talking like a baby to it with some weird expectation that they can understand us and that they will respond in a similar language that we will comprehend.
2. Animals, particularly dogs and cats, because, well, just read the above paragraph again.
It often happens that a man is more humanely related to a cat or dog than to any human being. - Henry David Thoreau