You've seen them sitting at their keyboards, wearing barely anything, winking at you, typing to nobody in particular with thin, lethargic arms: bored and conventionally beautiful.
The ads, with flirty video that might be live or recorded years ago, shout at you with promises of "Live Sex Chat" and "Sex Shows", with both amateurs and "pornstars" alike.
It's a web red light district, and unlike some gaudy Dutch strip or seedy sidewalk, you're completely anonymous. The basic premise of the cam girl game is a simple one: You pay a girl for her time, and in exchange, she'll take off her clothes, talk to you, play with herself (and others), or any combination thereof.
To find them, look no further than the Big Three of cam girl delight: Streamate, Live Jasmine and My Free Cams.
These three mega-networks advertise across the mainstream porn tube sites of masturbating ubiquity — Porn Hub, Clip Hunter, etc — but are shells and shadows themselves. The requirements are meagre: a computer and internet connection.
They invade your peripheral vision; they pop up behind your window.
The women wait for you to start staring, and, just when you're interested, they hit you up for money.
And when that time comes, you'll have thousands upon thousands of girls ready to swivel and smile for you in real time.
It's a massive catalogue of preening women of every variety: big, skeletal, black, white, Asian, American, Greek, Czech, etc.
Odds are, you're referred by a newspaper or website listing. Maybe you're shifting from traditional strip club work to the online equivalent — a popular trend in wealthier countries.
If you think cam girls — those flirty naked characters that plague porn site pop-up ads — are raking in easy money, you're right.
If you think cam girls are bleakly stripping online out of desperation, you're also right.