When the gentleman is receiving fellatio from his good partner, and wishes to heighten the pleasure of the general act he may want to 'monkeybag' them. This involves the simple act of tugging the partner's ears away and perpendiclar to the head, thus causing a change in appearance to these as well as the shape of the oral cavity and lips. The surprised noise emitted (invariably also simian in nature) increases the stimulation on the gentleman's lingam whilst rendering the aforementioned partner even more ape-like.
"I had to use her earrings as a monkeybagging aid again. Dear Felicity, she can certainly cook a good breakfast but she needs help when she's feeding on Mr. Pickles"