From him a "fuck" would mean "holy shit, what did I just get myself into" or "great pasta" or "I'm gonna get that guy for that". So, why do a guy like that need to stay up all night writing? He could already express the entire range of human emotions, with a single word.
John D'Leo - Warren Blake

“I understand I've got a larned nigger that writes letters and tries to get white fellows to mail them.”
Michael Fassbender - Edwin Epps

“Holy smokes!”

Joe Pesci - Joe Waters

“- Waiter: Are you ready to order?
- Rose: Yes, goddammit. I'm going to have the fucking poached salmon, with the son-of-a-bitching rice, and a dirty bastard salad with a shitload of Roquefort dressing. Thank you. And um, who knows what this asshole wants.
- Eddie Birdlace: I'll just take a fucking beer.”
Lili Taylor - Rose
River Phoenix - Eddie Birdlace

“- Eddie Birdlace: Where's our fucking drinks?
- Rose: You boys sure like to swear.
- Eddie Birdlace: No, we just like to drink.”
River Phoenix - Eddie Birdlace
Lili Taylor - Rose