He's saying that when you order coffee you order you can order:<p>"black coffee"
 -&#62; This is coffee without any thing added ( that's what the 'black' part means )<p>but<p>"black coffee, no cream, no sugar"
 -&#62; is confusing because it is redundant.  Sleepy baristas and dinner waiters/waitresses will hear that and think:
"coffee with cream and sugar" because, why would you order "black coffee, no cream, no sugar"  it makes no sense.