how accurate is the kids' swearing in Stand By Me

Reminds me of one of favourite jokes:

A sailor has just returned from leave and he’s in the mess talking to his buddy: “So I got off the fuckin’ ship, and caught a fuckin’ cab, and went to some fuckin’ bars, and I saw this fuckin’ sweet bitch, with fuckin’ big tits and fuckin’ great legs, so we started to fuckin’ dance, and she’s fuckin’ drinkin’, and I’m fuckin’ drinkin’, and she fuckin’ says ‘You wanna get out of this fuckin’ place?” and I’m all ‘Fuck, yeah,’, so we grab a fuckin’ cab and we fuck off to her fuckin’ place, and she puts on some fuckin’ music and then starts takin’ off her fuckin’ blouse and I’m all fuckin’ ready for it and she loses her fuckin’ skirt and…" At this point the sailor pauses to sip his coffee and his buddy tensely asks “Then what happened?”

The sailor looks at his buddy with an expression of contempt. “What do you fuckin’ think happened, ya fuckin’ idiot?”

“We had sexual intercourse!”