Innocent Teen Exchange or Flagrant Innuendo

Stage Scene:
A father and his teenage son sit in a restaurant dining. Teenage waitress approaches:
Waitress: “Sir? Are you enjoying your salad?”
Father: “It’s quite good, thanks.”
Waitress turns to Son-
Waitress: “And how’s your ‘Big Nasty’?”
Son: “Pretty Good I guess. I’ve never had any complaints.”
Waitress: “It looks pretty good. I want to try it but, honestly, it’s kind of intimidating.”
Son: “It’s supposed to be intimidating but I promise you, it’s worth the effort.”
Waitress: “Thanks. I’ll give it a try.”
Son: “Good choice. You won’t regret it.”
Waitress departs-
Father: “Dude, I’m right here… and I’m your dad!”
Son sprays Iced Tea from his nose…