There is already well established law in most US states and other nations regarding when you can record someone without their knowledge or consent. Nudity or sex need not be a factor. Recall the history when Linda Tripp recorded her phone conversations with Monica Lewinsky about her experiences with the then President Clinton.
The reason new law is being proposed here at all is because these cases are all involving recordings made with the full knowledge and consent (and being of sufficient age to legally give consent) of both parties at the time. The age of consent means you should possess the maturity to appreciate the potential repercussions of your actions. Which means this is a not a straightforward legislative proposal. If done badly it could supply a rationale for people to change their minds about a variety of things and make the other party criminally liable for something that was not a crime at the time. The slope is already there. No need to pour oil on it.