Penis

The penis is a sexual organ common to many species, particularly mammals and reptiles, and is specific to biologically typical males. In some species, such as humans, it has the extra function of allowing urination. Within human culture, the display of this organ is generally a taboo. In about 30% of human males, the skin towards the tip is removed in a procedure known as circumcision, which can be for religious or, it is argued, medical reasons.