It sounds to me a lot like this 'little' bullshit is a deeply messed-up way for a lot of daft girls who are absolutely terrified of their own sexuality to get laid. They find a guy who, for whatever reason of his own, will take absolutely all the responsibility for initiating sex onto himself, and claim they're too cute and innocent to want to do anything of the sort without basically being ordered to, which probably feels a lot safer than actually admitting they want sex and going in search of it. It's really not that surprising that this garbage fire of a fetish is attractive to some underage girls who want to get laid but also want to hang onto being a little kid and avoid the scary adult world of taking responsibility for their shit. Dd/Lg probably seens pretty attractive when it offers all the superficial benefits of a sexual relationship with none of the downsides, like the bit where they have to take off their footy pajamas, turn off Steven Universe and actually learn to relate to someone on an adult level. Acting like a total womanchild while still getting to have sex, and not having to admit they actually want to get fucked by a cishet shitlord because they just do what Daddy tells them like good little princesses? Half of them already dangerously fetishise their own childhoods as it is. No wonder tumblrinas eat this shit up.