Ohhhhh man..... unless you have killer muscular legs and and incredible backside there is no way in hell you should wear white pants/jeans. If you have the aforementioned things then you can get away with it because the girls' aren't going to notice to color of your pants
Only exception would be in one of those professional photo shoots on the beach with loosly hanging off white shirt and white linen pants, with the wind blowing, showing a tanned, muscular chest -- Ok, I'm leaving now.