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People have made the genitals such a taboo subject that even the mention of them will make someone blush. However, animals are friendly with their genitals - and develop them in different directions.
0.5 cm - male shrew
1 cm - cat
4 cm - male gorilla
14 cm - man
17 cm - banana slug
38 cm - the largest squid caught
40 cm - horse
42 cm - Argentine lake drake
48 cm - tapir
60 cm - one-humped camel
60 cm - rhinoceros
63 cm - walrus
76 cm - bull
77 cm - giraffe
1.0 m - African elephant
2.4 m - blue whale
P.S: You know, I'm a kind of tapir myself)