Originally it was meant to add custom animations to Skyrim like better idle poses for characters, improved walking/running animations and even dance moves. However, it helped shape many other mods, including the Sexlab framework. XPMSSE: Required for Sexlab and SoS mod.
Adds an HDT skeleton for better physics, bouncy boobs and butt-jiggle. Not essential, but it’s worth it mainly because of the 4K textures and better meshes (by better I mean curvy) No no, don’t laugh, you are reading this after all. I’ll leave the detailed explanation to the official mod page #Skyrim fnis sexlab framework idles download mod
Keep in mind though, there is a skill check and at first, you might not be able to utilize it for every character. Go to the college of Winterhold to become an archmage and gain some levels in illusion spells. That or you could just practice on easier targets first.
