One of the slightly confusing episodes of "Friends" is that of 1997, the premiere of the fourth season entitled "The one with the jellyfish".

As we believe you remember, as they quarrel and try to offend each other, Rachel says, "It's not so common, it doesn't happen to every boy and it's a big deal."

In an interview with Entertainment Weekly, producers Greg Malins and Adam Chase said:

"They were insulting each other," Malins said. "And I had this idea in my head that Rachel was saying, 'Well, once, when you ejaculated very quickly, I told you everything was fine, but it wasn't.'

Adam Chase said that the screenwriters managed to bring the sentence without the need for it to be explicit.