daniel post senning is the author of "manners in a digital world." hi. >> hi. it's good to be with you. >> daniel, we're all brought up to believe in having good manners. has technology changed that? >> absolutely not. good manners are as important today as they've ever been. treating people with consideration, with respect, with honesty are really the cores for all good behavior, and those stay the same, no matter what time or age we live in. >> so, what are some examples of things teens are doing or not doing that would be considered inappropriate? >> well, one of the things that i hear the most about is people using their cellphones inappropriately. sometimes that's texting at the dinner table. sometimes that's talking on the phone when they really shouldn't be talking on the phone when you've got a captive audience. maybe it's in the checkout line or an elevator or even in a bathroom. >> using a cellphone in a public bathroom? yeah, i could see how that could be disturbing. anyway, in your book, you explain where the word "etiquette" comes from. can you shar