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The female porcupines are only interested in sex 8-12 times/year. A male who want to mate with her gets up on his hind legs and approaches her whilst peeing on her from top to toe. He can do this from up to 6 metres' distance. If she is not impressed, she will scream and reject him. If she is ready, she will turn her back and genitals towards him, so he can get into the only safe mating position for porcupines.