I was checking out Alex Wild's Myrmecos blog. If you like insects and spiders like I do, you will thoroughly enjoy it. So do check it out.
Anyway, Alex had this video posted about jumping spiders and their mating habits. Absolutely fascinating!!! The male will dance and "sing" for the females by vibrating his legs and abdomen in a fast-paced syncopated dance not unlike a Flamenco dancer. I have already watched it four times because I think it is sooo cool!