Balls to the wall did not originate with steam engines, as some of these "authority" figures on the matter state.
Remember, there were no televisions back then, nor radios, the primary media was writing in books and magazines.
An extremely cursory Google search will show you this term originated with pilots OF THE VIETNAM WAR ERA.
books.google.com/ngrams/graph?content=Balls+to+the+wall&year_start=1600&year_end=2000&corpus=15&smoothing=3&share=&direct_url=t1%3B%2CBalls%20to%20the%20wall%3B%2Cc0
Gg. I'm going to bed now. Ninite.
I'm going balls to the wall (as fast as possible, all out, or extreme lack of regard)
This is when you are at a gloryhole and you hump in a way that your balls hit the wall. This can sometimes cause nausea and flaccidity of the penis.
I was at Isaac’s gloryhole last night and I went balls to the wall. I vomited all over his cat.
Something you say when something dramatic/shocking happens. Good or bad. ~Bribri
As Billi rushes to Ross, he drops his engagement ring in the lake. “Are you f’ing serious- my balls are to the walls!!”
Harry’s Balls were to the Walls in amazement that he found his dead grandmothers chowder recipe.
Balls to the Walls
Something you say when something dramatic/shocking happens. Good or bad. ~Bribri
As Billi rushes to Ross, he drops his engagement ring in the lake. “Are you f’ing serious- my balls are to the walls!!”
Harry’s Balls were to the Walls in amazement that he found his dead grandmothers chowder recipe.
Balls to the Walls
According to my mom it’s when someone (especially a male) goes full ham and therefore is spread eagle on the wall getting frisked by a police officer
We are going balls to the wall tonight and may end up in jail!
When your testicles stick to your thighs
Dam I'm real balls to the walls right now
A term originally coined in 1557, it means going in deep and hard. The term was originally used to refer to being balls deep (hence the plural "balls" to the singular "wall"), but was later "christianized," with most of the original history forgotten and replaced with steam engines, and eventually fighter planes.
He had me balls to the wall of my tight asshole.
Or
In that gloryhole, I was balls to the wall, and boi howdy, it was worth it.