We were at the beach with our kids a couple years ago. There is a nude beach at one end. The rest of the beach is clothing optional, but we found that most people had clothes on. A few ladies walked by topless. We found that this wasn't really a big deal, but I think it depends on your views of nudity. I used it as an opportunity to talk to the kids about different views. I would rather my kids see what "real" people look like instead of see perfect bodies in nude magazines!
Jodie