Sex. To do inner copulation, specific body and organic changes are needed. Within the human being males, the penis serves both excretory and reproductive functions. Our publishers will examine everything’ve supplied and determine whether or not to modify your article. Sexual activities, also known as coitus or copulation, reproductive operate where the mens reproductive organ… Continue reading Sex. To do inner copulation, specific body and organic changes are needed. Within the human being males, the penis serves both excretory and reproductive functions.