To that end, the Feels will come to those witnessing or living through a particularly moving moment when their heart is fullest and add additional emotion until the heart can no longer contain the pressure.
Most parents start the training when their children are between two years and three years old. But there's no official age, and you needn't potty train your toddler at all if you don't want to.
The age at which children are toilet trained hasn't always been the same. In the 1940s, for example, most toddlers began potty training before they reached 18 months of age, according to a 2008 report in American Family Physician.. White parents also tend to begin training later than African American parents.