The age of 25 is a milestone year – the year when the development and maturation of the prefrontal cortex, the part of the brain responsible for impulse control and decision-making, is finally complete. By the age of 25, you have reached maturity and have a fully formed brain. At this age, you also have absolutely no chance of hooking up with Leonardo DiCaprio. :(

Leonardo DiCaprio's rule of only dating women younger than him, precisely only girls under the age of 25, has been one of the trending topics on social media these days. Fans of the Titanic star have strange theories about his dating habit. DiCaprio recently split from Camila Morrone after she turned 25.

Explaining the superstar phenomenon, psychologist Emma Kenny told The Sun, "He's in a very unusual position which allows him to pick and choose who he wants to be with. Until he gets bored or realizes that the partner wants to move to safer ground through marriage or having children.”

"The age of the women he associates with and the point at which their relationships end seem to coincide with these life indicators," the psychologist said.

According to her, DiCaprio "has no intention of giving up his adventures" and does not want to "conform to a social plan."

Previously, the superstar has been linked to Gisele Bündchen, Bar Rafaeli, Blake Lively, Erin Heatherton, Toni Garrn, Kelly Rohrbach, Nina Agdal and none of them were more than 25 years old.