Simply a natural in front of the camera (and by some accounts, behind one too), photographer Irv Carsten once said of June:

"I felt ashamed using an automatic camera. Her posing is second nature, she's beautiful from any angle, and without camera settings to make, there's nothing to do but watch."

On a side note you've probably noticed June regularly took the razor to her thatch, resulting in a smooth & rather nicely defined mons venus nestled between the V of her thighs. Although shaving wasn't widespread in the mid-60s population at large, it was fairly common for models in the British "glamour nudes" genre. Whatever one's opinion on landscaping & shrubbery, I think we can probably agree the loveshorn look suits her quite nicely...