1.) Birthday Suit Out of My Sight! by Hexagonal-Bipyramid
For Sims who are Never Nude: They will never get naked. They will change into their swimsuit instead.* If they are naked for whatever reason, they will be shocked, change into their last outfit and be embarrassed. Also, with CJ-LessNakedFreakout_expectNeverNude, Sims won’t freak out when they see their lovers naked. However, this won’t be the case for Sims with the Never Nude trait.
Sims who have @midgethetree‘s Mermaid trait and the Never Nude trait will change into their underwear so they will still have their mermaid transformation when submerged in water.
Everything Sims 2 