We often lower the pitch of our voices when we’re talking to someone we find attractive. Because of the common stereotype that husky, breathy, and lower-pitched voices are sexier, both men and women may unknowingly try to sound more like Barry White or Scarlett Johansson if they’re talking to someone they think is hot. (, )

When a cat wants to be fed, it imitates a baby human. Hungry cats emit a vocalized, high-frequency purr that’s in the same acoustic range as the cries of a hungry infant, and humans subconsciously recognize it as being more urgent than other purrs. (, )