I'm a burly bearded man. I check out the "geek", "technology" and "science and nature" sections. I also search for camping gear and kayak pics on the Pacific ocean that remind me of my time kayaking from Anacortes, WA to the San Juan Islands. I have also posted my own very humble nature and landscape photographs on Pinterest. Pinterest is trying to "attract" males, but males need to think to use Pinterest.
I'm using Pinterest to collect pictures of watches, cars, retail shops, and many other things. Way better than using Google Images and saving the pics one by one.
Edit: Add link to article that made me think of Pinterest differently: http://highscalability.com/blog/2013/4/15/scaling-pinterest-...