A rusty trombone is not just a handjob. It's anilingus at the same time. The rusty part is because the lips get covered in "rust" from the "mouth piece" of the metaphoric trombone.
I'm over here amazed with how many times I had to read the headline before my brain would register what was wrong. It's times like this that I can almost understand how stuff like this happens. Ha
The easiest way to solve the editorial issue for a lot headlines like this is to simply ask a teenager to read it. Their reaction will tell you if it's correct or not.......
It's "first-hand". English is stupid. Sometimes two words don't become compound. Sometimes they do become compound and they're just grafted together, like in German. And sometimes you use a hyphen. I'm really good at writing and I can't always keep this shit straight.
That's a different kind of use for hyphen though. The use of hyphen that I'm talking about is actually flexible, used as-needed to turn any given multiple words into a single adjective, adverb, noun, etc.
Also, never get your English punctuation (or other) patterns from JRPGs, nor from popular usage on the internet. I'm not saying literacy is lowering, but I will say that people with poor literacy use the internet more than ever, and bad patterns emerge.