seeing a guys' head get blown off in Pulp Fiction is different than when a student-peer says "Hey you wanna hear a bad word?" -- I feel like I shouldn't need to explain that.

My parents took me to see R-rated horror movies when I was like 8 years old. It owned.

One benefit of them having done that is I cannot possibly imagine giving a fuck if somebody says “fuck.” Context is what matters. Saying “fuck yeah dude!” in front of kids does absolutely no harm.

Are you under the impression a movie theater won't let a child into an R rated movie when accompanied by a parent? Because they certainly will.