"A Guy Thing" is a romantic comedy film released in 2003, directed by Chris Koch. The story revolves around a young man named Paul, played by Jason Lee, who finds himself in a complicated situation after a one-night stand with a woman named Lara, portrayed by Julia Stiles. As he navigates his feelings and relationships, he discovers the challenges of commitment and honesty. The film explores themes of love, friendship, and the expectations placed on men in romantic relationships. It features a mix of humor and heartfelt moments, showcasing the struggles of understanding oneself and the opposite sex. The supporting cast includes Selma Blair and Tom Wilkinson, adding depth to the narrative.