The smell of hot brake pads mixed with tire rubber is often associated with driving cars, but it can also be arousing for some people. This phenomenon is called automotive eroticism or "carsex." Carsex refers to the attraction that some individuals feel towards cars, including their smells, sounds, and textures. It can range from simple appreciation of the car's design and performance to intense fetishistic fantasies about using or being used by a vehicle. The exact mechanisms behind this attraction are still poorly understood, but research suggests that it may involve a combination of psychological factors such as conditioning, attachment, and sensory stimulation.

Conditioning is a learning process where an individual associates one thing with another. In the context of carsex, the association between the scent of brakes and sex could occur if someone has repeatedly experienced both together in similar situations, such as during car rides.

The scent becomes associated with sexual feelings and arousal. Similarly, the sound of engines revving up can trigger associations with excitement and power. Attachment theory posits that humans have an innate need to form secure bonds with objects, including cars, which can lead to strong emotional responses when they are present. Cars can become symbols of independence, freedom, and control, making them appealing objects of desire.

Sensory stimulation is another possible factor in carsex. Cars produce a variety of sounds, smells, and textures that can activate physical responses. The smell of hot rubber is often described as musky and earthy, while the sound of engines revving up can be exciting and energizing. Some people also enjoy the feeling of the leather seats and other tactile experiences associated with driving. All of these factors contribute to the overall experience of driving, which can become eroticized for some individuals. This sensory input may interact with fantasy and imagination to create a powerful erotic response.

A driver might imagine themselves being pursued by a sexy car, or using a car to dominate their partner during sex.

The intersection of automotive eroticism and psychosexuality can be confusing and complex. Car owners who feel attracted to their vehicles may find it challenging to distinguish between healthy appreciation and unhealthy fetishization. It is important to seek professional help if carsex begins to interfere with daily life or relationships.

There is nothing inherently wrong with finding pleasure in cars or exploring one's sexual desires within a consensual relationship.

Carsex is just one manifestation of human sexuality, and it should not be judged or stigmatized.