Ok, so the guy goes for as young as he possibly can and we’re going to assume that that confirms that he wouldn’t going any younger if he could? That’s the thin ice I’m talking about.

Oh it wouldn't surprise me if many would go lower if the opportunity presented itself. Some of them, a small minority, will be paedophiles, and would go as low as they could. However, biologically the majority are simply attracted to fertility, attractiveness, i.e., young women, not girls. That's exactly why there's a need for an age or metric where ambiguity regarding potential harm/manipulation is decreased to a minimum, because obviously any kind of harm toward living beings is unethical; spare self-defence, but that's neither here nor there.

I agree that we cannot call him a pedophile because there is no direct evidence of it, I’m on board with that, but his actions are not doing a lot for him. If he said “oh yea I like 24 year olds and older” that’s still weird for his age but it shows that his limit is a personal one and not a legal one.

Only aiming for as young as legally possible would be suspicious, but as far as I'm reading he's still together with his wife Jessica Seinfeld who he met when she was 26, so I'm not yet sure what you mean by "his actions". Anyway, what about what the women think in these situations? Shoshanna was on board for four years, and so were her parents. There's no indication Seinfeld was inappropriate.

“Not Lonstein, though. What distance there is between them on life’s time line, it seems, they more than make up for with a similar temperament. “I am not an idiot,” says the comic. “Shoshanna is a person, not an age. She is extremely bright. She’s funny, sharp, very alert. We just get along. You can hear the click.” Within weeks after their first date, friends and neighbors grew accustomed to the sight of the Seinfeld limousine idling outside the Upper East Side luxury apartment building where Lonstein lives with her 15-year-old brother, David, and her parents, Zachary, a wealthy computer-store owner, and Betty, a home-maker. The Lonsteins have always approved of the romance. “Shoshanna is very mature,” says a source close to the family. “Jerry is thoughtful, a good person. The family have nothing but positive feelings about the both of them. Everyone respects their relationship.” ―The Game of Love

Women are as biologically wired as men are, and equally flawed—just look at how Justin Bieber was publicly salivated over at a similar young age, that's clearly not okay. Meanwhile all of these discussions oftentimes sound as if women are always at the mercy of men. They aren't.

It’s also weird that he says he could love someone whole-heartedly but also couldn’t properly communicate with her on more nuanced topics. Like, what made this minor so great and why could he not find that in anyone between 30-45y/o?

If you were referring to "I can’t philosophize with her", that's a quote from a wholly different book about two siblings part of the youth resistance in Nazi Germany. I just found that sentence particularly apt to decide whether a relationship is right or not.