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?!
nape-after-a-bath fetish, 
navel-showing-under-a-tight-shirt fetish,
Nacken-nach-dem-Bad-Fetischen,
Nabel-sichtbar-unter-engem-T-Shirt-Fetischen
d’une nuque à la sortie du bain,
du nombril dépassant du T-shirt,
della nuca dopo la doccia, 
dell'ombelico sotto una maglietta aderente,
nuca após o banho, barriguinha de fora