porcupine love   (link)

http://www.improb.com/airchives/paperair/volume8/v8i3/porcupines.html
How do porcupines make love? You would probably think the answer is "very carefully," but you would probably be wrong.

The answer is more improbable and much more bizarre than that. While browsing in the basement of the Australian National University library one day, I came across two papers (see references below) which described in great detail the details of the porcupine’s sex life. The information contained in these papers is of such great importance it is paraphrased and presented here. The next time a friend asks you how porcupines make love, you can set them straight by describing these events (in as much detail as you dare).

References:
"The Sex Reactions of Porcupines (Erethizon d. dorsatum) Before and After Copulation," Albert R. Shadle, Marilyn Smelzer & Margery Metz, Journal of Mammalogy, vol. 27, no. 2, 1946, pp. 116-21.
"Copulation in the Porcupine," Albert R. Shadle, Journal of Wildlife Management, vol. 10, no. 2, 1946, pp. 159-62.