[falcolas]

Makes a bit of sense, in combination with the "be female" advice, cutting off the forehead puts the center of the photograph closer to her cleavage, and typically shows off her entire chest.

[goodJobWalrus]

Cleavage does not feature a lot in the top 100 actually, but I'm half way there, in a sense that I'm a female. I'll definitely try the half-forehead thing next time!

[visarga]

We could try and see if the activation for good selfies comes from the cleavage or the eyes.

[lqdc13]

I thought cutting off forehead happens when the target is closer to the camera, so it is more personal.