Dragonfly Kama Sutra

Grasping the female’s head in his mating pincers, the male first must transfer his sperm from a storage site on his lower abdomen to a copulatory organ inconveniently located on his upper abdomen. Then he must induce his headlocked mate to curl her genitals up toward that loaded midbelly penis, and wouldn’t you know it, she’s already mated and the male must pause to expand a little bristled lobe to scrape out the previous suitor’s sperm. 

-- from Nature's drone, pretty and deadly Natalie Angier