Speaking as the husband of an R.N., and as someone who has associated with a lot of female R.N.s over the last 40 years, I just want to say that I've never met a nurse who finds any of this nakedness sexually arousing in the slightest. Similarly, I have a brother who's an OB/GYN, and he assures me there's nothing sexually arousing for him about
examining women's private parts all day long.
At one point after surgery, my R.N. wife and a hospital nurse worked together on a catheter problem I was having, during which I was naked from the waist down. I wasn't embarrassed, and neither was my wife or the young nurse. It's just part of their business, and not all that pleasant a part, either.
These folks have seen it all, are used to seeing the human body in every shape and form, and I think we can all relax and tone down any concern about being unclothed in their presence.