Anyone who has ever been around a set of twins knows that twin talk is definitely a real thing. What's fascinating is that before babies learn to talk, they intuitively know how a conversation works and they'll often echo the sounds others make. Because twins have a companion right from the start, who's at exactly the same developmental stage, twin babies will naturally gravitate toward developing a shared language with its own sounds and syllables that nobody else can understand. It's this pre-language communication connection that can give some twins the unison that non-twins perceive as telepathy. In this adorable video, brothers Grayson and Griffin chatter away in their twin talk before bedtime.