Gale and Zemeckis drew humor from the cultural contrasts between 1955 and 1985, such as Marty entering a 1955 soda shop in 1985 clothing; the shop owner asks Marty if he is a sailor because his down vest resembles a life preserver. They also identified conveniences of 1985 that Marty had taken for granted, but would be denied in 1955. Gale and Zemeckis struggled with the writing, as they were in their 30s and did not particularly identify with either era. They were inspired by the All-American aesthetic of films by Frank Capra featuring white picket fences and exaggerated characters similar to Biff, The Twilight Zone, science fiction films, and books by Robert Silverberg and Robert Heinlein. The romantic relationship between 1955 Lorraine and her future son was one of the more difficult writing challenges. Gale and Zemeckis attempted to take the concept as far as possible to keep the audience on edge. They believed it had to be Lorraine who stopped the relationship; she remarks that kissing Marty feels like kissing her brother. Gale jokingly said no one asked how she could make that comparison, but that audiences would accept it because they did not want the relationship to happen. The second draft was completed by April7, 1981.
Gale and Zemeckis drew humor from the cultural contrasts between 1955 and 1985, such as Marty entering a 1955 soda shop in 1985 clothing; the shop owner asks Marty if he is a sailor because his down vest resembles a life preserver. They also identified conveniences of 1985 that Marty had taken for granted, but would be denied in 1955. Gale and Zemeckis struggled with the writing, as they were in their 30s and did not particularly identify with either era. They were inspired by the All-American aesthetic of films by Frank Capra featuring white picket fences and exaggerated characters similar to Biff, The Twilight Zone, science fiction films, and books by Robert Silverberg and Robert Heinlein. The romantic relationship between 1955 Lorraine and her future son was one of the more difficult writing challenges. Gale and Zemeckis attempted to take the concept as far as possible to keep the audience on edge. They believed it had to be Lorraine who stopped the relationship; she remarks that kissing Marty feels like kissing her brother. Gale jokingly said no one asked how she could make that comparison, but that audiences would accept it because they did not want the relationship to happen. The second draft was completed by April7, 1981