So, if your partner is truly feeling positive emotions, the trained body language expert would see it in the eyes – “a look your smile can’t disguise.” 3. Pupil dilation.

“An applicant actually can smile in their passport photo, as long as both of their eyes are open and their mouth is closed in the photo,” a spokesperson for the department told HuffPost.

Cats do smile, but not in the way that humans do – while we bare a grin to show our happiness, cats smile with their eyes, says Marci Koski, a feline behavior and training consultant.

Like who you are inside. It shows up in your smile, in your eyes, in your laugh, and in those things. So that’s some of the things that I do most.

Your eyes, their color, and how you use them can affect the impressions you make on others. Although eye color is believed to be permanent from birth, there are circumstances that can make it change.