Quoted from icust298:
If you're going to get fired for looking at a "boob" pic at work, you're not as valuable to the company as you think.
I don't care who you are, if someone complains to HR about feeling "sexually harassed" by something on your monitor, you are in for a world of hurt.
The company will protect itself at all costs. If you think you are immune to that, you either own the company or you are fooling yourself.