Childe effect 

The Childe effect is the effect for which everyone wants to fuck a fictional character after initially hating them, it is named after the Genshin Impact character Tartaglia "Childe" the eleventh harbinger of the fatui

The Childe Effect: wanting to fuck a fictional character after initially hating them
everyone:"wow I hate Childe!!!"
everyone after a maximum of 2 days:"I want to fuck Childe in the ass!!!"

Childe effect by Balls and Balls and Cock March 1, 2021

The Only Child Effect 

When someone is extremely spoiled or is a huge bitch as a result of being an only child.

Why is that kid such an ass?
Oh he is always like that. It is the only child effect.

The Only Child Effect by TehRealBigDoge April 7, 2015

child athlete effect 

The tendency of kids who grew up playing a competitive sport and then retired in their teens to tryhard video games, have a good sense of momentum, timing, and intuitive controls, be prone to careers requiring more discipline, and being used to regiment/feeling lost without rigid schedules or structure.

"Hey, why is John so good at timing his jumps in Mario Kart 7?"
"Oh, that's just the child athlete effect. He did competitive gymnastics for 7 years before quitting."

child athlete effect by Cry_onis September 5, 2021