There are many different factors that influence the psychological aspect of car design and how it relates to sexuality and attraction. One important factor is the shape of the vehicle itself. Cars have been designed to have certain shapes that can be considered sexy or attractive for both men and women.
Some vehicles may have rounded curves while others may have sharp angles. The type of material used to make the body of the car also plays into this aspect as well, such as chrome or aluminum.
Another factor is the sound of the engine when it accelerates or decelerates. This sound can be very stimulating for people who enjoy hearing cars in action. It could remind them of their own sexual organs or even arousal. The color of the car can also play into this. Some colors like red are often associated with sex appeal while others like white may seem more conservative.
The placement of windows in a car can also influence someone's view of another person inside. If they have clear visibility, it can lead to voyeuristic tendencies where they might stare at other drivers passing by or watch them at traffic lights. This can create an erotic atmosphere that leads to fantasies about what is happening behind closed doors within the car.
Observation systems and side mirrors allow drivers to see around corners or obstacles without having to turn their heads too much which creates an almost pornographic effect where one person can observe another from afar without being seen themselves. This can increase feelings of excitement and desire for those watching through these windows/mirrors since they know they aren't being watched back but still get an intimate view of something private going on outside their field of vision.
There are many different ways that cars can relate to psychology and sexuality including how designers approach making vehicles sexy while keeping safety regulations in mind.
Individual preferences will vary depending on personal taste so everyone has unique experiences regarding automobiles' psychosexual attraction factors.