Why ask why?

So tonight in Philosophy class we discussed the Socratic Method. Pretty much Socrates was the man. Definitely my kind of guy. Brilliant in all his irony and sarcasm and simplicities. The guy liked to ask questions and annoyed a lot of people in the process, which ultimately resulted in his death. So now I am going to do the same to you, but without the death part. If the unexamined life is not worth living then I better get to it. But I'm not going to just examine my life because although it's greatly helpful to me it's not nearly as fun as examining other peoples. This is something Socrates knew. So I'm going to post many more questions in here because wisdom isn't knowing that you know, it's knowing that you don't know. Here it goes. Question 1. Why in television and movies when two characters are on the phone, does neither one of them extend the courtesy of actually saying the word "goodbye"? How is it that they just instinctively know that the other person is done with the conversation and that there will be no offense taken as they ramble off the last sentence and then cuh-lick. hang up? Who does that? I know I don't. I don't recall ever being on the phone where there wasn't some kind of closure (unless it was a telemarketer on the other end of course). Every time I see it on some sitcom or movie it bugs me. Especially when it's only one side of a conversation. The camera focused on the actor who you know is babbling into nothingness yet he laughs, does the body gestures, pauses at just the right time, pretending to listen and then continues with the appropriate response. And then you have it, no final "farewell" or quick "okay-bu-bye" or even a simple "c,ya!". Just the click. Why?