OK, I have to clarify it. What do you expect from nude category, why don't use strip instead? Without any clothes at all or what?
Yeah, most girls would have pics that clearly belong in strip category. Nude is without clothes, I don't think we need it right now but it will be handy in the future.
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On a separate topic:
I am working on logic and finances right now and planning to rework how the game works a little bit because I didn't take everything I should have into consideration (Like a fact that strippers basically do not make any money at all other than a small amount of tips and it would be retarded to leave it at that, several other issues as well).
So I decided to make a different system. Every free girl will expect a wage, there will be a button in girl profile menu to make sure she gets it every turn even if it doesn't go straight into her pocket from work she preforms. Prostitutes will STILL expect a cut of the profit even if it's bigger than the wage they should expect but that cut will depends on girls disposition towards you and will be eventually balanced in such a way that if her disposition is over 500 out of max of a 1000, she will be happy with working for 40 percent. Rest of the girls will be happy with just wages so you can basically set house percentage to 100 and pay them what they require to be happy. If you choose not to, their joy and disposition drop rapidly and they leave your service.
Under this system, slaves will cost more as you do not pay them a wage and have higher upkeep than free girls as you have to feed and take care of them otherwise, while free girls buy their own food. Another advantage of having a free girls working for you instead of slaves that would otherwise be overwhelmingly cheaper workforce, is that free girls will spend money they make to improve themselves and maybe buy an occasional item if they have enough cash.
I think this will be a fairly honest, intuitive and interesting system. If you have something to add, have a different system in mind, or other design tips, let me know.