It's ossur for a man to look at a woman for pleasure. Even to look at her small finger with the intention of having pleasure from it (See EH"E Siman 21 Sif 1.) Is there any prohibition for a woman to ...
I think someone in another question here (or on another site?) said he was told by his "chassan teacher" not to look at his wife unclothed. It seems like this is not the real halacha to me, or at ...