Could be a lot of reasons why this happens:yes you are right i am a beginner but i learn fast
Such a question, most of the animation of the sex scene, the penis is out of the vagina, I set up the penis with arrows, I turn on the animation, but after a while the penis is back in not the vagina, how to tie it correctly, maybe there is some kind of plugin or is this a common problem for all collisions
-The scene creators have no idea how physics work in this game and have set up the scene very poorly.
-You're trying to change a look of a person without the correct scale
-You don't have all dependencies of the scene
-Your game runs at 10fps, basically breaking all physics
General rule of thumb: Try to run the scene without any changes and see if it works, doesn't give any loading errors.
The specific "Penis out of the vagina" problem can be fixed with
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, but there seems to be a problem with the scene you're trying to run anyway.