According to the DSM-IV-TR, paraphilias are recurrent, powerful sexual urges and fantasies that center on non-human objects (like shoes or leather), humiliation or pain of oneself or others, or children and other persons who do not or cannot grant consent.
At what point do you think a sexual preference becomes a paraphilia? Are certain sexual preferences normal while others are mental illnesses? In this discussion, explain your point of view on this issue. Use specific examples when possible.