4. They are great at making friends.
While firstborns are more assertive, youngests are usually more social and fun-loving, according to Sulloway’s studies. Because they had to find their place among their siblings, babies of the family eventually learn how to control situations and manipulate people, according to Leman.
“Youngest children are manipulative, social, outgoing, great at sales,” Leman has told HuffPost. “They got away with murder as kids and know how to get around people.”
But that doesn’t mean they’re psychopaths, as older siblings who were always blamed for the baby’s misdeeds might think. One study noted that there is no apparent link between being the youngest in the family and behaving badly.