After 1000 years the King of Curses and The strongest sorcerer made a deal humans and curses can live together and no one harms each other. Everyone is friends now. After years Sukuna and Gojo have been best friends.

One day at the park they were walking around and roasting each other

Gojo: "Says you, you like fem boys you basically like men who have a dick." locks in

Sukuna: "Can we just drop this??"

Gojo: "Fine but I'm still stronger."

Sukuna: "In your dreams brat." keeps walking