One might imagine that sex is a delicate act for these prickly animals. In fact, because a female could impale her lover with one quick flick of her quills, a male won't pursue a female unless he’s damn sure she is ready and willing.
So what gets a female porcupine going? As it turns out, she likes a golden shower.
That's right: a male will drench his potential lover in urine, often at high velocity and from a distance. If she's not interested, she'll whine and shake off the shower. But if she's into it, she'll expose her (quill-less) underbelly and allow the male to mount.