When photos do contain people related to the task at hand, or the content users are exploring, they do get fixations. However, gender makes a distinct difference on what parts of the photo are stared at the longest. Take a look at the hotspot below.
Although both men and women look at the image of George Brett when directed to find out information about his sport and position, men tend to focus on private anatomy as well as the face. For the women, the face is the only place they viewed.
-From OJR
What have we learned? Know your audience. If you’re designing for men (especially straight ones) show lots of crotch shots.