Maybe the first two kids were named after relatives and the parents didn’t get to use the name they liked until the third kid.
Or The Earl of Doncaster! (And maybe even King Edward VIII if the rumors are true 
)
Also, their second child was a girl, so that kinda leaves out naming her Martin.
The way her mom drinks, she’s lucky she wasn’t named Martini.
Kodak Instamatics, which debuted in 1963, were easy to carry. Cameras before then were clunky. Not something you could put in a pocket or a purse. Also, even if someone took a photo of Marty, it would probably sit in an album somewhere, never to be seen again. No photo sharing back then.
Well, you can always pull out, even if you don’t have birth control available. People has been managing for centuries, I hear.
Anyway, the only really relevant question nobody’s asking is- Why would Marty MacFly even know Johnny B. Goode? Why not something by Van Halen, or Bon Jovi, or whatever 1980’s teenagers listened to? And why would the people at the dance be so astounded by a song that was only a four or five years in the future? And why would he say that their “children would love it”? Some of them would love it in a few years, when they were in their early twenties and the song appeared. Their children wouldn’t even have heard of it.
J B.G is a classic. Possibly, Marty, in his drive to be a better musician, was student of the history of rock.
“Your children will love it” refers to the later era of rock as symbolized by kicking over the speakers.
I don’t think he was specifically talking about the song, but the balls-to-the-wall guitar solo he started shredding at the end, that included the destruction of sound equipment.
Marty was not just a generic 1980s teenager; he was the guitarist for a band, The Pinheads. They auditioned, remember, in the “Battle of the Bands,” but were rejected for “being too darn loud.” Their audition was an amped-up power chord version of “Power of Love,” and the megaphone-wielding judge that rejected them was played by . . . Huey Lewis.
In any event, it’s very likely that a nascent band trying to get playing gigs would learn lots of cover songs. Such as “Johnny B. Goode.”
His comment “your kids are gonna love it,” did not refer to JBG, but to the stage antics he improvised, like smashing stage equipment, a reference to similar antics by Pete Townshend of The Who.
Want a real brain-breaker?
Homer Simpson and Marge Bouvier met in the last year of high school. Homer was slightly older, since he’d repeated a grade at least once, so figure at graduation, she’s recently turned 17 while he was nearly 19, so that in later adulthood, she’d be 36 and he’d be 38.
They conceived their first child the first time they had sex, in the miniature castle on a putt-putt course, before they were married. So why is Bart 10 when Homer and Marge are 36 and 38? Did they date without having sex for nearly a decade after high school?
First up, for an eighties kid playing rock guitar, Johnny B Good was essential, even if your personal tastes were more Van Halen or ZZ Top.
Marty was referring to the very 80s solo that he broke into after he finished “duck-walking” across the stage - which was a Chuck Berry move.
He then does some Pete Townsend power chords and a stage slide, Jimi Hendrix behind the neck riffs, Angus Young back wriggle, Van Halen style tapping and 80s metal sweep picking ending with a traditional rock’n’roll amp-kicking. That is what he refers to when he says:
I guess you guys aren’t ready for that yet, but your kids are going to love it
and Ninjaed
A wizard did it.
Ok serious answer. because when the show started, they were not yet 30. They were, co-ink-a-dent-a-diddily just about my age at the time. Homer had many of the same experiences as me at the same ages.
But since Bart should now be about 39, something had to give. Now Homer and Marge are stuck in some ill-defined mid age, that makes no sense.
They know him as Calvin in the '50s, not Marty.
Also, how often do people open their yearbooks when they’re adults? I haven’t looked inside one for at least ten-fifteen years. I’m not entirely certain where they are, right now. In a box somewhere in storage, I’m assuming, but they might be gone altogether. I wouldn’t be surprised if George and Lorraine haven’t looked at theirs since before Marty was born.
When was it established that it was their first time? I thought it was just prior to them getting married.
Only at first.
Family Guy did a cutaway on this, with George asking Lorraine pointedly why Marty looks so much like that guy she had a thing for in high school.
On the OP: our first child was born 18 years after we got married. Sometimes these things take a while.
I was still 16 on Oct. 25 of my senior year. I then turned 17, graduated the following June, and turned 18 in November while away at college. My kindergarten rule was that if you born Sept-Dec, you wait until fifth birthday to start school. If born after Dec 31, you wait until next September to start KG.
I presume if I was 16 in Oct of senior year, almost everyone else was 17.
Exactly. No parent looks at their teenage kid, who they’ve raised from birth, and thinks “Huh. He reminds me of someone.”
Besides, if they’re like most parents, in their minds he’s still 8 years old.
As was said, Marty was important to them, but not as important as a family member, maybe one who recently died, or was a family patriarch, or a traditional family name.
Still, now it pokes at the baby Martin growing up to look like Marty.
“So George, what other names were you thinking of”
“Well, how about Martin, after Marty, that odd kid we met in High School for a couple of days?”
“Martin … after Marty … yeah, that’s sweet” Pats belly “You like that, Marty”
—years pass—
“Say, didja notice, we name him Marty, and he seems to be growing up to look like that guy”
“Yeah, odd. Like in the movies, when you give a kid a name, and they look like the name…”
“You mean like, you name somebody Engelbert, and they grow up dweebish and geeky, requiring strong eyeglasses, that sort of thing?”
“Yeah, or if you name a girl Helga or Bertha she grows up dumpy looking, whereas if you name her Roxanna she grows up to be a hot blonde regardless of familial genetics?”
“Yeah, wait, are we in a movie?”
Then the time paradoxes built up over the films melts the celluloid as the credits roll.
And besides that: suppose you opened your old yearbook and saw a picture of a kid that looked just like yours. Would you think:
a) “Wow, that looks just like my kid!”
or
b) “OMFG!!! My kid must have invented a time machine and traveled to the past!”