Do you know Jim Knowlton, won the IgNobel'92 for his anatomy poster "Penises of the Animal Kingdom," a portion of which is reproduced here.
[left to right: Whale, Elephant, Giraffe, Bull, Horse, Pig, Porpoise, Ram, Goat, Hyena, Dog, Man]
Read more at the Improbable Blog (check also this link for a video on how penises work; not as simple as you would snigger).
As a bonus, Jim Knowlton gets to teach courses with cool titles, like the Human Gross Anatomy at the Indiana University. The closest cool (or hot?) homophone that I get to teach is the 'Pennes' bio-heat equation, which looks like this: