To Have and Have Not (film) 1944. Bogart and Hawks served as their own technical advisers, because of their experience with fishing and sailing. After filming began, a romance developed between Bogart and Bacall, despite Hawks's disapproval. Bogart was married and at 45 years old, he was more than twice Bacall's age. They kept their relationship a secret from Hawks. This romance eventually led to Bogart divorcing Mayo Methot, his third wife. He and Bacall married a year after "To Have and Have Not" and remained married until Bogart's death in 1957. Hawks expanded Bacall's part to take advantage of the Bogart-Bacall chemistry. According to the
Sleep and memory actually become worse at the task. The individuals that were allowed a 30-60 minute nap seemed to gain stabilization of the skill as no deterioration occurred. If allowed a 60-90 minute nap (REM sleep and slow-wave sleep), individuals displayed enhancement. Unlike the motor task, enhancement was not suppressed during the nocturnal sleep if the individual had napped earlier. In the situation of visual skill learning, naps have been shown to prevent wakeful deterioration and even enhance learning above and beyond enhancement occurring in nocturnal sleep. Shift workers who work throughout the night have been known to have far more accidents