Wow. What a thread.
I am a photographer and I have no interests in "nude" pictures in and of themselves. Here are a few thoughts I have:
The word "nude" does not specify a gender. I certainly think both Venus de Milo and Michealangelo's David are beautiful works. Nor does the word specify function - it could be used aesthetically, sexually, or scientifically. I think an interest in "nude" photography does not limit or fix an attitude. Although, I think if you are worried that your partner would approve, the idea of inappropriate behavior or reasons is being implied - I don't mean scientifically. This is probably where the problem is.
I think the reason for doing "nudes" is as varied as people are. I am sure there are some who get sexual gratification from it. But there again there is no gender implied here. I guess we could find statistics that point to one group doing it more than another, but that is a matter of degree rather than an absolute difference. Are women sex objects? Yes, and so are men. Do you need to be naked to be a sex object, no. It would appear that both sexes exploit their sexuality for their own benefit. The degree on how far that is exploited changes as society changes. Is Demi Moore exploiting her sexually or being exploited?
I cannot remember the photographer's name, but she did a series of nude protraits of her children. Porn? Well, she had her problems with the authorities, but where was the dirty mind - in the viewer or in the artist? Clearly David is not pornagraphic. It is an amazing piece of work. Could someone be aroused by it. Maybe, but it is not a problem of the work.
Are interests in sexuallity wrong? We are sexual animals. Wouldn't be many of us around if we were not. I think interest in the form of the opposite gender is natural. Obviously, many photographers pursue interests. Some are attracted to violence, some to geologic forms, the human body is just another interest and maybe the artist is interested in sexuallity. (I do find it interesting that violence and its portrayal is so accepted in US society, but sex which is a natural function of life is hidden and taboo. I also think we would have fewer problems if we went to bed with our enemies than to war with them.)
Regardless of the type of work, nude, still life, nature, journalism, the work I like the best comes from mature artists. Not in the sense of a mature career, but a mature human being. Pornography (meaning a work intended to arouse you) is not a mature form of art.