Lets be honest 'premature ejaculation' sounds an balding accountant would say.
A 'quick cum' is premature ejaculation for people who are proud of it.
"That girl over there is hot."
"Yeah. She's a quick cum for sure."
"Sooo.. How was your first time with Tom?"
"Amazing... such a quick cum."
"That guy is hot."
"Out of my way, I'm going to make him quick cum in his pants."