This is out now as a beta branch - password is "yesiamover18", enter it in the betas tab under the application properties, then select the beta.
You can access properties by right clicking on the game in your Steam library list.
If you don't want nudity, no worries - if you don't opt-in, you won't see any of it.
If you do opt in and change your mind later, you can swap back to the standard mode through the same tab.
We're planning on leaving early access in a few days - after we're sure we haven't created any new bugs with the naked patch.