What is the dirty, oily area of hair and skin on my cat's tail? (pethealthnetwork.com)
When worn without a setting powder it lasts me about 6 hours before fading on oily areas like my nose & chin. (thefemininefiles.com)
The tangles and the mats can form on every area of the coat but they usually occur in areas of friction (for instance, the armpits) or in oily areas (such as the area behind the ears). (yorkiemag.com)