I just love being nude whenever I can. In the house, outdoors, at the beach, anywhere I am not bothering anyone. My parents always swam nude in their pool as long as others were not around. I would talk to my mother while she took her bath, so I have always been comfortable with nudity.
Ladybree, your husband may not have had a "free" upbringing and have issues with nudity. This may not be easy to overcome. I can relate to your desire to get him to enjoy the freedom of no clothes, but the objections may be deep in his past. I agree with Petercooper, he might find himself more relaxed if he were with a group of people who are comfortable without clothes, but getting him there may not be easy. Who knows, perhaps a good conversation would get him thinking and willing to try. Good luck.