Best Razors?


I've shaved for several years now but never been told what to shave with and how often to change my razor? I moved in with my mom recently and shes been getting on me about how I've literally been using the same razor since i moved here last summer. But she was never taught much about shaving either so she's not much help. What razors are the best? I usually just shave my armpits and down there, and my legs occasionally (i have next to no leg hair to begin with). Also, what shaving cream is the best for down there that won't irritate me? I get REALLY bad red bumps. And how often should i change my razor?