At the time, comedy fans were just relieved they were not related.
Now, before you get all judgy, Seinfeld insists that when he met 17-year-old Shoshanna Lonstein, he "didn't realize she was so young." And when it became apparent, "the age issue" was immediately forgotten, as any doubts he might've had were immediately drowned out by a mysterious, thunderous slap-bass resounding from the heavens.
JERRY: So we met in the park yada-yada-yada I was wearing a purple turtleneck yada-yada-yada dating!
He insisted they never dated until she was of legal age ("We just went to a restaurant, and that was it," he said, presumably referring to Chuck E. Cheese's), and that her youth wasn't what attracted him, calling her "extremely bright" and "very alert." These statements only raise further questions about exactly what Seinfeld thinks a date is, as well as his fetish for radioactive cats.
But while the media embarked on a bizarre campaign to implore the public to ignore "the age issue," it wasn't so easy for the couple to do the same. Like all high school romances, it started to unravel once she discovered frat parties. They very nearly became engaged, but Seinfeld was adamant that his wife wouldn't work, which presumably doesn't sit well with a recent UCLA grad, and Lonstein found herself "bored by Seinfeld talking constantly about work." Huh, it's almost like teenage girls and middle-aged men don't have much in common.