It came as no surprise that humans had the concept of domestication. Every major civilization had that. What surprised us was that humanity took it a step further and domesticated even the most extreme of predators that they could find and tame...something others would hesitate at doing. Soon, even those predators became exotic pets before eventually reaching the general pet market. The ones that couldn't be easily tamed but could be tricked to not recognize humans and sapient species as prey soon were given homes in wildlife sanctuaries and zoos.

However, humans soon turned their focus towards sapient species, especially the most aggressive and warlike. They used a similar tactic called 'charm' to help improve relations with each other. Eventually, we saw that these races and civilizations were improving relations with each other. From the wolfish Houons, the spider-like Jeyuns and the tusked, iron-muscled Orcs to the fair-skinned Aurans, the mothlike Varyns, and the scaly, fanged Chyrans, no civilization could resist the pull of the fabled Humans, a species that could be as warlike as Ares yet as loving as Casanova.

Soon, there were reports of humans and their harems of lovers which, although rare, was certainly an impressive feat. Even despite most humans only taking one lover as their bride or groom, there were reports of humans having straight, gay, lesbian, bisexual, or even pansexual harems. And even then there was the biological compatibility for fertile offspring, which resulted in great joy once people realized that all sapient species were biologically compatible with each other, especially humans.

Aside from those, there was the size. Occasionally, harems may only be two lovers, yet even rarer is a harem of 6 or 7. However, I have seen a man with 36 wives at a nudist resort I frequented, which has subsequently broken the record of 21 lovers in a harem. Before humans, few would think this would be possible. Yet now, we know it can be done.

With all this, you would expect humans to be in danger with the predators in their homes and in their beds, but they are predators too. They hunt for food, snare for study and rehoming, and capture hearts for love. Not only have they contributed to technology, but they have become the catalyst for a closer bond between aliens and the chance of a possible Galactic Union.