Automobile arousal has been studied extensively in both psychological and sociological fields. The phenomenon is known as "the car effect" and refers to the heightened emotional state experienced when individuals interact with motor vehicles. This feeling can range from mild excitement to intense desire for intimate contact with automobiles. Various theories have been proposed to explain this attraction, including Freudian psychoanalytic theory and evolutionary psychology.

Freud believed that the human mind has three levels - the conscious, preconscious, and unconscious. He suggested that the unconscious contained repressed desires, including sexual ones. According to his theory, a person's unresolved sexual issues could be projected onto an inanimate object such as a car. Thus, their love of cars might be due to repressed sexual feelings directed towards them. Evolutionary psychologists posit that humans are attracted to objects that provide reproductive benefits, such as resources or protection. Therefore, they argue that people may find cars appealing because they represent strength, power, and status.

Cars can also evoke strong erotic associations for some individuals. Researchers have found that people who become sexually aroused by cars tend to exhibit more frequent and varied autoerotic behavior than those who do not. They may engage in activities like rubbing themselves against cars or masturbating while thinking about them. Some even go so far as to fantasize about having sex with cars or engaging in fetishistic acts involving vehicles. While this type of behavior is considered taboo in most societies, it does exist among certain groups.

Despite the stigma surrounding auto-erotism, there is evidence that it can be a healthy expression of human sexuality. In one study, researchers found that people who engaged in autoerotic behaviors reported higher overall satisfaction with their relationships compared to those who did not.

Autoeroticism was associated with lower rates of depression and anxiety.

Excessive involvement in autoerotic activity can lead to compulsions that interfere with daily life.

The attraction to automobiles remains largely mysterious. It appears to stem from a complex combination of biological, social, and psychological factors. Understanding this phenomenon could help us better understand ourselves and our relationships with others.