I too approve of this. Partly because in the space game a bro and I are writing, my faction is exactly that, but with more cybernetics. His faction is the "humans as the dominant political power" theme we see, mine is hedonistic space cyborgs, and the third one is genetically modified corn.
In addition to other things, I would like to add. He wanted to play aliens, despite being told humans were the only spacefaring race. Still wanted to, so we offered him genetically modified things that look like aliens, but are humans. He replied "Genetically modified? What, like corn?". To this day, the piss is still being taken.
Back to the point. It does make sense, considering how we naturally produce adrenaline and silly amounts of hormones - there's no guarantee that alien races will also do so. In fact, there's nothing saying that aliens have to have a pleasure centre or drives like us, so they'd see our culture as a novelty. Those with those centers would probably be akin to us, so they'd appreciate quite how easy it was to drink, smoke, take drugs, and get laid in human culture.
The possibility of become intergalactic space dealers and hookers seems possible - once we have alien neighbors, a lot of scientific research is available, meaning that many have no relevant skills. We'd have a surplus of resources, given how fast humanity spreads, and little to do with it. We're also incredibly social, as a species, so having our culture seen as THE place to be for aliens would appeal to most people.
Now, there's got to be someone on Earth with every fetish, the internet makes that pretty clear (see /d/), so once word got round that our people were fucking every type of non-human sentient to cross our borders, they're going to see us all like that. It's how stereotyping happens. So even if most of us just wanted to get on with life, we'd still be seen as the slut race.