Re: nudity
Sara, when taking off ones clothes (forexample showring or changing) its good to say bismillah, this way your body is hidden from the Jinn.
Limited nudity around the house isnt bad, but running around naked all the time is well...kinda wierd :)
Just remember to say Bismillah before getting nude.
Also realize that Jinn can, and do fall in love with humans specially when a man/woman's beauty is on display. Therefore recite dua's to expell jins from your house and/or protect yourself and your body from them.
Its wise to also recite certain dua's before having sex, so that jinn donot take part in the activity.
There are ahadith about all of this.