Big Daddy is an Adam Sandler movie about a single man who changes his life when he fosters an unwanted child. As with many of Sandler's films, "Big Daddy" explores themes of father-son reconciliation. Big Daddy was one of the first roles where Adam Sandler showed that he could take on family roles and be a father figure.
Unlike his three college friends, Sandler's character has been unsuccessful. A legal settlement provides him with enough money for an apartment, but he can't keep a girlfriend. Someone gets him to take care of a little boy, and he teaches him all sorts of bad habits, which is supposed to be funny. Like using an outdoor wall for a bathroom, or making a rollerblader fall down. But Sandler bonds with the kid so much that when Child Protective Services tries to take him away, he goes to court to adopt him. At first, Sandler's character thought the impressionability of the boy was humorous, since Sandler could get the kid to mimic all of Sandler's actions. However, by the end of the movie, Sandler's character has realized what it means to have someone look up to you for guidance. The valuable lesson is that parenthood may be fun, but it is also a responsibility.