He felt her hand on his asscheek and it turned him on.  HIs wife had never been so interested in his anatomy.  He used both hands to support himself as he pushed out of her.  He pushed back in, letting gravity do the majority of the work and the hood made a loud "Cur-chunk!" Sound as he hit both her and the car with enough force to bend the hood out of shape, temporarily at least.  Undeterred he raced back up, slamming into her again, "Scream, whore.  I want my wife to hear you."   He said with no small amount of malice in his voice.