What's that?

The boys were here today.  They were inspecting an assortment of men's old jewelry pieces. They're 8 and 10 years of age, and very knowledgeable about a great many things. But I find they do not know (1) what men's cufflinks are.  "They go where, and what are shirt cuffs?"  They do not know (2) what a tie tack is.  "It looks like an earring, and what do you mean, tack a tie to what?"  Likewise, (3) they have never seen a tieclip either it seems. "What do you clip it to?"  (4)  They were totally in the dark as to the function of  a replacement watch band.  "Where does it attach and how do you get the old one off?"  (5) The removable metal buckles from the old canvas military belts reminded one boy of toy tanks.  "A belt buckle?"  Most intriguing (6) to both was an ID bracelet of the old metal chain-link variety, once a staple accessory of coolness. "Why would you have your name on  it?"     I told them to watch "Mad Men" and all will be made clear.