system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why do our voices change and get higher when we talk to a baby or a cute animal (like a puppy)?
gpt
We're not 100% sure on that one, but it is apparently a cultural thing.

Not all cultures do this, some don't change tone of voice around children while others completely ignore babies and don't talk to them. So it appears to be a learned behavior.

One theory states that we change our pitch around children because women naturally have a higher pitched voice then men, so we do it as a kind of innate attempt to make us sound more motherly or less threatening around children. You'll also note that we do the opposite, using a deeper or more male tone when applying discipline.

The reason we do it around animals is that we tend to treat Dogs and Cats like our children.