Oyu is a term coined in the late 16th century referring to the use of plants for sexual stimulation, such as a pine cone in the ass or zucchini in the pussy. Oyu is very pleasurable and reached the height of its popularity in the mid 1700's across Europe. Oyu tends to cause odd secretions and unhealthy dieting by its participants. Oyu is used by natives to cleanse and stimulate the worshiped "asshole" also known as the butthole.
My wife won't fuck me anymore because she is constantly performing oyu with a pickle.