They say that twins know when eachother are there and eventually develop their own "twin language". I believe it!! If either of them are fussy and you lie them down next to eachother they instantly stop crying and Johnny will usually try to scoot near her! We've even seen them suck eachothers fingers!! Here I was able to capture Alexa smiling at her brothers grunts as he was trying to inch closer to her! Sooo cute!!