Research has found that some paraphilias, such as voyeurism and sadomasochism, are associated with more lifetime sexual partners, contradicting theories that paraphilias are associated with courtship disorders and arrested social development. Scientific literature includes some single-case studies of very rare and idiosyncratic paraphilias. These include an adolescent male who had a strong fetishistic interest in the exhaust pipes of cars, a young man with a similar interest in a specific type of car, and a man who had a paraphilic interest in sneezing (both his own and the sneezing of others).
Research has found that some paraphilias, such as voyeurism and sadomasochism, are associated with more lifetime sexual partners, contradicting theories that paraphilias are associated with courtship disorders and arrested social development. Scientific literature includ,es some single-case studies of very rare and idiosyncratic paraphilias. These include an adolescent male who had a strong fetishistic interest in the exhaust pipes of cars a young man with a similar interest in a specific type of car, and a man who had a paraphilic interest in sneezing (both his own and the sneezing of others).