Phonography

Describing "biology" on the phone while masturbating. Usually includes moaning and explanations of sexual scenarios.

Made famous by Britney Spears in her song "Phonography"

I make no apologies
I'm into phonography
And I like my bluetooth, buttons comin' loose
I need my hands free

Let's talk about biology
Make believe you're next to me
Phonography, phonography
Talk that sexy talk to me

Keep it confidential, you and me
Dirty talkin, call it phonography