For some animals getting it on can be hard work and even downright dangerous.
Male Túngara frogs woo females with a call that is so full of energy and passion, it creates ripples on water. Bat predators listen for the calls, hoping for a frog dinner.
"When a bat flies by, the frog's first line of defense is to stop calling," Rachel Page, a scientist with the Smithsonian Tropical Research Institute. "But the water ripples continue for another few seconds, effectively leaving a detection footprint for the approaching bat."