Age difference: 0 years.
Age difference: 1 year.
Age difference: 3 years.
You've existed long enough to know which gender is getting older than the other. And as these movies continued, this seemingly small difference became a larger plot point when Michael Bay literally shoved statutory rape laws in our faces. Now, in The Last Knight, Mark Wahlberg's character Cade Yeager is getting a romantic lead who's 14 years younger.
Sure, 14 years still isn't much when you're talking about an older couple. But going by that exponential jump, the age difference in the 19th film will be 47,221,574,400 years. Failing that, I'm gonna say that Transformers 2060 will feature a love story between a 16-year-old girl and a 60-year old dude -- probably played by the kid who plays Dustin on Stranger Things. Also, 70-year-old Mark Wahlberg will totally be there, along with a wacky black sidekick friend played by Idris Elba. When asked why such a prestigious and old actor would participate in Transformers, Elba will go on about what an artistic inspiration 90-year-old Michael Bay is and that the film was a blast to make. Because that's literally what happens every time a veteran actor farts their way through the Transformers cash-tunnel.