25 O-Faces And Other Sexpressions Caught On Film

From:  Queerty

 The male orgasm is an intense neuromuscular euphoria that begins with a gradual throb of the sphincter and climaxes with an explosion at the tip of his penis, about 10 to 15 seconds later. It inspires lots of “oohing”, “f–k yeah-ing,” grunting, heavy breathing, and, of course, the infamous, unconscious O-face.
The expression we make at the moment of orgasm is perhaps the most primal of all. It’s a mixture of pleasure/pain, concentration and release. Facial muscles contort. Eyes bulge. Nostrils flare. Lips curl. And mouths open, releasing animalistic moans of ecstasy or, as the case may be, shrieks of delight.
Some O-faces are more animated than others. Even the most intense O-faces can be kinda hot. Let’s just hope that facial recognition software isn't good enough to interpret these emotions. Otherwise we’re all in trouble!

The Contemplative O-Face