If you don't want to use NyanCat's body textures, disable the [BODIES] submod.

If you have already started a game / loaded a save with the submod enabled, disabling the mod through the main menu won't work. To remove it from your save:

1. Open the "Load" menu and select your save.
2. Check to see if the [BODIES] submod is part of the mod list.
3. If it is, click on "More" in the bottom right corner.
4. Use the Choose Mods menu to disable it for that save.

If all else fails, double-check that the [BODIES] mod is not still being loaded with your save, and verify your game cache.

If you have tried all of the above and are still experiencing problems, post a report here or in the comments for help.