A "selfie" – a photo you take of yourself and post online -- is a phenomenon that's pure 21st century.
"Selfies" often reveal a lot and lead to more questions. That's true in the case of the "selfie" Geraldo Rivera of the FOX News Channel tweeted out around 1 a.m. Sunday.
Rivera says he got home late from work, everyone was asleep, he had no one to talk to, he had a drink, he started looking at the photo -- which he took the morning before -- and he decided: "I look good for a 70-year-old. I gotta tweet this out." For better or worse, he did.
It's not nearly the most trouble a "selfie" has caused. "Selfies" were key evidence in the scandal that brought down the former congressman Anthony Weiner, who is still getting himself trouble.
Of course, he was sending the photos directly to women who were not his wife, along with a sex chat.
There was a similar story for the former congressman Chris Lee.
The website Gawker published his "selfie," along with an email exchange said to be with a woman seeking a date on "Craig's List." Lee, who was married, is said to have called himself a "fit, fun, classy guy."
"Selfies" are frequently sexual in nature, as seen by tweets by some celebrities such as Kim Kardashian.
They also serve professional purposes. Hillary Clinton, who will need young voters if she runs for president again, took a "selfie" with her daughter Chelsea in Chicago last month. Chelsea tweeted it out.
And another "selfie" making the internet rounds is one a Japanese astronaut took last year outside the international space station.
We can understand the need for a "selfie" if you're in space, but why do the rest of us do it? Is it like Geraldo and we're just bored?