The exhibitionism mod in The Sims 4 is part of the notorious WickedWoohoo mod. Even without mods, The Sims can be a pretty weird game. There are more than a few mods allowing you to see Sims naked, if you're into that sort of thing which, let's be honest, you probably are. From massive "adult get-togethers" to pregnancy tests for men, there are a ton of weird Sims mods out there.
PILLOW TALK MOD
The WickedWhims mega-mod by Turbodriver includes all the sexy sex stuff for your sims to saucily cavort to, and includes a host of new sex-themed custom traits, reactions, moodlets, and whims. The Exhibitionism Mod. The Sims 4 is ending support for bit operating systems.