PhD in Sexology and Psychosexual Counseling. For More Info WhatsApp- 9604715783/9359863878. The head of the penis, called Glans, consists of corpus spongiosum and has a higher concentration of sensory nerve endings than the shaft of the penis. The skin covering the penis is freely movable at the tip and is called a prepuce. The cheesy substance called Smegma is secreted by prepuce and is accumulated underneath the prepuce; Smegma should be washed away while taking a bath. The color, size, and shape vary considerably from one male to another. The non-erect penis usually becomes smaller tiny size while more prominent when erected and vice versa.