When people commonly speak of fetishes, they're referring to what's known in psychiatry as "fetishism." One example is the underwear fetish. At what point is this considered an illness?!
In other words, if it doesn't 
cause problems, then it's fine.
Wenn also keine Probleme auftreten,
ist alles in Ordnung.



Las fantasías, los impulsos 
sexuales o los comportamientos 
provocan un malestar 
clínicamente significativo  o 
un deterioro social, laboral o de 
otras áreas importantes de 
la actividad del individuo.

En raison de ces impulsions,
désillusions ou actes sexuels,
l’individu affecté souffre
ou rencontre des problèmes
sociaux ou professionnels.
In altre parole, va bene finché
 non causa problemi.
Ou seja, se não te causa problema, então tudo bem.