The subject of this study is the role that car suspension plays in human eroticism. As most people know, cars are designed to be driven, and their designers take care to provide a comfortable ride. This includes making sure the driver can see the road clearly, while also feeling stable and safe. One way engineers achieve this stability is through car suspension; when riding in a car, your body moves up and down with each bump, but the springs push back up so you don't feel it.

There may be an unintended consequence of this process which relates to our psychosexuality.

As humans, we experience much more than just visual stimuli. We receive tactile input from touching, hearing, smelling, tasting, seeing, etc., and these sensations contribute to our arousal levels. In some cases, certain types of contact or movement have been shown to evoke particularly strong reactions in people.

Consider the act of riding in a car with someone else. You might enjoy leaning into them as they drive, feeling the vibrations coming from the road and the movements of their arms as they steer. If you pay attention to what is going on below the surface of the vehicle, though, there is another level of movement happening: the movement of the suspension. The springs push back up to keep the car balanced, creating the same kind of physical action as sexual intercourse. If you imagine yourself lying on top of your partner in bed, you'll notice that the movement is similar in many ways.

In addition to the obvious connection between car suspension and human movement during sex, there are other possible connections between driving and intimacy. The fact that most cars are designed for one driver means that drivers often spend hours alone in their vehicles every day. This can lead to feelings of isolation and loneliness, which may manifest themselves in strange ways. One study found that people who had trouble finding partners were more likely to own sports cars, perhaps because of the associations between performance and success. Another study found that men who drove sedans were more likely to cheat on their partners. While it's hard to draw firm conclusions about cause and effect here, it is certainly true that there is an association between automobiles and eroticism.