How to replicate the cursed speech technique? By Okkotsu Yuuta

"You must kiss him."
"W-what? Kiss Inumaki-senapi?"
"To master his techique, you must know it. All you need is to kiss Inumaki-kun and then you can replicate it."
Au, where Gojo-sensei is supporting Okkotsu in learning the cursed speech technique; however, the best hypothesis he has is that in order to replicate the techniques, one must know them closely.