If you’ve been waiting for Jessica Alba to do a nude scene, it ain’t happening. That’s because she has a nudity clause in her contract. She was quoted in the June issue of Glamour as saying, “I don’t want my grandparents to see my boobs. It would be weird at Christmas.” Besides, Alba – who’s reprising her role as stripper Nancy Callahan in the upcoming “Sin City” sequel – says that her nakedness won’t elevate any of the films she’s done. You can see for yourself when the “Sin City: A Dame to Kill For” hits theaters on August 22nd.