Phonetic Misunderstanding

Sean the "junkie" was on the phone to a salesman. The salesman asked him for his name.

"Sean" he replied, the salesman asks him to spell it, using the phonetic alphabet.

"What's the phonetic alphabet"?

"You know, sir, "A" for alpha, "B" for bravo, etc etc"

Sean, not the most educated of men, thought he was just saying the first words that popped into his head.

"Ok, so it's "S" for smack, "E" for e's, "A" for anal and "N" for nailed mate"

"Erm... sorry?"

"It's ok pal, no need to be, it was my girlfriend that picked it up".