fetishist

1. N-COUNT 恋物癖者
   A fetishist is a person who has a strong liking or need for a particular object or activity in order to experience sexual pleasure and excitement.
   1. ...a foot fetishist.
      恋足者

1. But the real problem is what if the panty fetishist comes back.
   可问题是万一那个内衣癖狂再来怎么办？

noun

1. one who engages in fetishism (especially of a sexual nature)