Whats with the oral sex poses?

[€uroMeinke]

Now you've got me wondering what it means in the cultural context. There's the literal "I enjoy performing/receiving cunnilingus" but I wonder if it's sonethin more like flipping someone off where instead of saying "**** you" you're saying "I lick your pussy" or maybe it's a more positive affirmation instead of a "pat on the back" it's a "tongue in your cooch". I think more research may be required to get the full meaning of the gesture.