Even without mods, The Sims can be a pretty weird game. From massive "adult get-togethers" to pregnancy tests for men, there are a ton of weird Sims mods out there. Thanks to Rule 34 , a lot of the weirdest mods revolve around naked characters, though there are a number of PG funny mods from The Sims.
Released a couple of months ago and further updated this week, WickedWoohoo is a mod that allows players to do an extraordinary number of new sex-related acts within The Sims 4. Seriously: the feature list for WickedWoohoo is bananas. The short of it is that the mod adds new kinky animations and interactions.