Fetish directly means sexual desire of some part of body(except sexual organs) of opposite sex.. we, hair fetish ppl get EXCITED on hair. Basically v love hair.. it may b long, short, shaved anythng which depends on individial..
Some ppl like short hair, some long hair, some shaved head.
But the thing is v get sexually aroused wen v think/see/talk about hair/hair combing/oiling/washing/cutting/shaving..
Hope it clarifies..