an awkward moment, when friend's fat arm makes the girl look naked ..... though no one is naked here!
At first phase, it looks as if the girl in the middle is naked and hence trying to hide herself behind her friend ..... but, if you watch this party photo carefully, you'll easily notice no one is naked here ..... rather, the front girl's fat arm gives the impression of nakedness.
Also Watch :
hidden butt illusion, another cool accidental illusion, where a girl's armpit gives the impression of butt.
