I'm a guy. How do I get curls like the ones seen here?

/home/leaving?" class="Popup

My hair is naturally curly, but to a certain extent. I think I can pull off the look seen in those pics, our hair is very similar but I can't get my curls to stay as "bouncy" as they look in those pics. Do I need a certain product? If so which ones do you recommend?

Also I was interested in this hairstyle as well:

/home/leaving?" class="Popup