Female bonobos often tend to choose the same attractive male for mating, researchers observed

Bonobos have a reputation for being the peaceful, free-loving hippies of the primate world. But, researchers of the Max Planck Institute for Evolutionary Anthropology in Leipzig, Germany, and Arizona State University in Tempe, USA, have discovered that despite friendly relations between the sexes, particular males have a surprisingly strong advantage over others when it comes to fathering offspring. For example, researchers found in one group that the most reproductively successful bonobo male fathered more than 60 percent of the next generation.