You control the game, all the events and perversions. It’s cute!
Realistic hair that can flow and blow in the wind, react to gravity, (the kind you see in Pixar movies) is pre-rendered offline by lots of machines configured in render farms and then assembled frame by frame by video editing systems usually for promotional cut scenes only. Sorry to say that even for triple AAA titles for PS3, xBox 360 etc, and especially games like ours, that quality at 3D movie quality levels is still realistically a few years away, so were stuck with low poly, bones based polygonal hair for the next while.
Sex games interactive are cool!