Group fingering for the old grannies included the following act: Old ladies group fingering involves using their fingernails and lips to stimulate the partner's penis. In the event of old granny using her lips and fingernails, oral sex is performed between the two. This act is commonly referred to as, "Fucking Her In The Butt", since fingering is performed in the butt. It is a known fact that the old gals really like it big time..