I like hebes and pubescent girls (as well as adult women), but I can never understand the sexual attraction to prepubescent children.
When girls hit puberty, they're fertile, sexual, horny, flirtations, making hormones and sending out pheromones, etc.
But prepubescent toddlers (and especially nepi) do not have any of the features or signals that make one sexually attractive.
Thats because you cant think outside of your box.
For one, you dont cosider people could be not into the stuff you listed here. Fertile means risk for heteros, and menstruation for lesbians, sexual means they could look elsewhere too and ntr is a niche kink, horny, tease and flirts are NOT bound to puberty at all, many kids have these traits too and handle them in a much more playful manner then most adults, pheromones are secondary, everyone watching porn or playing avn can attest you the visual part is enough.
Now lets check these visuals, the 5 core changes during puberty are growing body hairs, developing tits, growing up and reducing/losing the cute trait on the way, developing a more defined figure and worsening skin (you can argue the point of view, but if you ever felt the skin of a child even by just holding a hand or wiping a tear you know what i mean).
And now lets see...it became common for girls to shave and for guys to want their girls shaved. The trend of preferences goes to smaller tits (except for breeding kinks and milf lovers), guys always prefered smaller women, not everyone likes hourglas physiques, many like them thicker with less defined waist and the megaton of skin care products wouldnt exist if people wouldnt prefer young skin...and kids dont use them because they dont need them.
So, despite you being unable to understand why, you should be able to see the basic trends.
At least thats the loli facts...toddlers are another level with additional rules and kinks since they are still learning everything and some still need potty training. But nepi kinks are completely different from everything else, these are mostly control/power/taboo kinks because nepis are unable to do or say anything, from my point of view the nepi stuff is rape only, those who are into such content must define them as living onaholes because they dont have any personality yet and dont even have developed the sweet/cute traits common for lolis and toddlers.
As lesbian i'm not really an expert for shotas, but its common knowledge most adult guys are furries, prefer to take the lead/control, often resort to violence and mostly care more about their own cumshot then the orgasm of their partners...shotas are completely different, sure, some are already mean/selfish assholes, but they lack the power to hurt adults and they are still close enough to their educated manners to appreciate sexual favors, so those who are into it may consider them sweet or cute as well, and like lolis they lose it growing up, just faster, i never saw anyone who prefered teen guys over shota or adult, so there seems to be a rule breaker line from both directions and no hebe like middle way. For a more deep analysis ask a shotacon, as said, as lebian i'm not interested in anything with a dick, no matter the size.