Quit stringing me along

[Hat tip to the OG]
Two pieces of string walk into a bar and the barman says:

"I don't serve pieces of string in here"

So the two pieces of sting go outside. The older piece of string gets an idea and after much wriggling and pulling out some pieces of thread, he enters the bar again.

The barman says:
"Wait a minute ... I just kicked two strings. You look familiar. Are you a piece of string as well?"

Came the reply:
"Nope, I'm a frayed knot"