World Record Cock

Okay, listen up, you smooth-brain. This one's a real knee-slapper if you know what's up. You're probably the kinda guy who thinks 'library' means 'loud music party zone,' but let's try anyway. You see, the dude says his "cock" was in the world records book, but he means it in two ways, the way a penis is slangily called, and as a rooster. When the librarian says "take it out" she is being asked to remove something from the library (the book), and also that he needs to remove his penis from where she can see it, which implies it is out in public. So, it's funny because it uses the double meaning of words, and implies that his penis is so big and popular that it is in the world records book and everyone can see it. Do you understand? Probably not.