Another Texting Mystery!?

Hello, All!
I am a baby boomer and, yes, I confess to being a bit clueless sometimes about the things, like "texting," that everyone else it seems have long taken for granted. Alas, I am still loyal to my fountain pen and monogrammed stationery but I do want to learn.
What does it mean when a colon precedes a capital letter, for example, :P or :D? My teenage nieces use such terms in their email correspondence but I'm too embarrassed to ask them what it stands for.

Emily2012-08-19T12:07:21Z

Favorite Answer

Oh! Those are smiley faces! If u look at :D sideways, the colon is the eyes, and the capital d is the mouth! Same with the other one but the capital p is a mouth with a tongue sticking out! Hope this helped! :P

?2012-08-19T12:10:01Z

Lol! It's a face! If u turn ur phone sideways take a look. :P Is a guy sticking his toung out and :D is someone with a big smile. Other are: :) :( ;( XD :-/ :-) so on.

Anonymous2012-08-19T12:09:30Z

You have to look at them sideways. They represent little faces. Colon and D is a big smile. Csn you see? :-D
Turn your head sideways.

Jay2012-08-19T12:04:33Z

:P or =P means sticking your tongue out
:D or =D means laughing