Knock, knock.
Who's there?
QoS.
QoS who?
QoS there me me who me and you.
Knock, knock.
Who's there?
QoS.
QoS who?
QoS there me me who me and you.
Hey, numbskull! This is a knock-knock joke that doesn't make any sense! The punchline is supposed to be a play on words, but it just sounds like a bunch of gibberish. Seriously, did you even try to make this funny? You probably think you are smart, but I bet you eat crayons.