Some Nude for a Cause ads are sort of nasty, (coming off a bit trashy) and not tasteful at all. Here are two that I think are not only creative, but also beautiful and well done.
Ballet dancer Sian Murphy, went bare to benefit Macmillan Cancer Support.
Here is former 'Baywatch' babe Traci Bingham in an anti-meat campaign for PETA.
How does this help aspiring models? Well, using your body for parts modeling and working with a modeling agency for parts modeling would involve a style similar to the photography above, showing the body in a very tasteful style. I would also look at ads for skincare products, such as lotions, shaving products, and sunscreen and shoes to get inspired.