Preputial glands

Scattered glands on the corona, neck, glans and inner layer of the prepuce, the preputial glands, have been described.  They secrete a sebaceous material of very peculiar odor, which probably contains casein, and readily undergoes decomposition; when mixed with discarded epithelial cells it is called smegma.

Note: Preputial glands (Tyson's glands" (glandulae Tysonii) are a controversial anatomical concept. The term refers to small, modified sebaceous glands purportedly located in the coronal sulcus (the groove between the glans penis and the prepuce/foreskin) and on the mucosal surface of the prepuce. Their existence in humans has been debated for over three centuries.