Cognitive and cultural embeddedness: combining institutional economics and economic sociology
According to this, pederasty is sexual relations between two males, especially when one of them is a minor. Other definitions, like the one that JSBangs found, differ slightly. But otherwise, I think you answered the question yourself: pedophile refers to the attraction, while pederasty refers to the act itself.
An abdominoplasty, or tummy tuck, is a procedure to remove loose or excess skin resulting from pregnancy, weight gain and poor elasticity of the skin. The procedure includes removing most of the fat and skin between your navel and public area, tightening the connective tissue in the abdominal area and repositioning your belly button.