Psychological studies have found that the smell of petroleum products such as gasoline can be an arousing stimulus for some people. This phenomenon is called "psychosexuality", which refers to the emotional and physical reactions associated with automobiles or their parts. Researchers believe that the scent of gasoline may trigger memories or associations related to sex and arousal, leading to increased levels of excitement and attraction. In addition to its potential effects on libido, the odor of H2 + CNG aroma has also been linked to psychosexual fantasies involving cars and driving experiences.

Some individuals may imagine themselves speeding down the highway while filling up their tanks, engaging in various types of erotica. Others may find the sight of a vehicle's engine or exhaust system particularly alluring, and even seek out customizations or modifications to enhance this experience. Some researchers suggest that these fetishistic behaviors may stem from childhood experiences or cultural influences, whereby certain objects or activities become associated with sexual pleasure or desire.

There are also more practical explanations for the link between psychosexuality and car-related sensuality, including the fact that vehicles are often seen as symbols of power, freedom, and mobility - all qualities that can be associated with masculinity and femininity. The presence of powerful engines, sleek designs, and smooth lines can contribute to feelings of confidence, control, and dominance, making them attractive to many people regardless of gender identity.

The use of language and imagery related to automobives in advertising and popular culture can reinforce these associations, perpetuating the idea that cars are inherently sexy and desirable.

The study of psychosexuality in relation to cars highlights the complex and multifaceted nature of human behavior and desire, demonstrating how our thoughts, emotions, and experiences can shape our attitudes toward objects and activities we encounter every day.