Nah. All the sex animations are generic and common to every character. Every girl blows the same way, every girl does missionary the same way, every girl rides the same way. Use the console to have Girl A ride Guy A and Girl B ride Guy B side by side, you'll seem them go through the exact same motions in lockstep.What do you mean? All the final big animations are usually unique to that character. The ones re-used are few and far between.
Dont believe me? just look at the console list for valid intimacy acts.
What you're confusing this with are the "cutscenes," which are only a pretense of variety. Cutscene Madison does the generic missionary animation followed by the generic doggy animation, cutscene Rachael does the generic missionary animation followed by the generic doggy animation except it's on the floor and you're looking at it from a different camera angle.
I understand why this is done; it's much cheaper to for the dev to just run a script for a few canned animations and call it a "cutscene" than to hand-animate / mocap unique motions. It sucks regardless.