I've been tinkering with this sex swing for a while now and used it in a few animations to iron out the kinks. It's not super easy to set up and can requires a bit of knowledge on how constraints work to parent elements properly to a character. So bear in mind, if you're new to Blender, this will likely be challenging to use.
Do reach out if you have any trouble using the swing.
See it in use here: https://x.com/RubberAnimation/status/1952794490562924572
Change log
v1.0 - Initial release
v1.1 -
a) Empties replaced by bones (spheres)
b) Leg holders can now be moved for more flexibility
c) Scaled some bones to better visibility
d) Fixed a reference error in one of the geometry nodes
e) Minor fixes
https://linktr.ee/rubberanimation