I would have performed this scene for real - J-Law is a professional and would want the job done properly, so only unsimulated masturbation would only be realistic enough. And of course ejaculating in front of her would really sell the scene. Small applause from the cast and crew; tissue clean-up if she got any semen on her; a smile and a handshake as she returns to her trailer. I'm no hero ma'am, just doing my job.
