A brain teaser -- not too easy, but not too hard.?
There are 3 nude men and 3 nude women in a room with no windows. They are all standing against 1 wall looking out towards the door. 1 of the 3 men is Adam and 1 of the 3 women is Eve.
The first person to say how to tell Adam from the other men and Eve from the other women, gets 10 points.