D: An unattractive looking male appendage which has uses in sexual reproduction.

Feminists alternatively describe it as a pathetic turkey gizzard or as an instrument of terror, depending on whether they are trying to humiliate men, or call themselves victims of them.

Interestingly, the human penis is larger than it needs be. The human male has the largest penis (as a fraction of body weight) than any other mammal. This suggests that it has been designed by evolution for the attractiveness of the female. So, gents, maybe size does matter.

See