A scene depicting the penile orgasm, a rhythmic almost jerking motion of contractions of…

A scene depicting the penile orgasm, a rhythmic almost jerking motion of contractions of the genitals. Theme: Realistic, Realism. Scene: A woman, hands tied behind her and man are naked as the woman performs fellatio, her head sliding back and forth on the mans penis with a soft slurp and the muffled moans of the woman, the man groans in pleasure then the camera zooming into the groin, his penis tensing and contracting 2 or 3 times rapidly then 1 or 2 times slowly as he cums inside of her mouth, he slowly slides his penis out with a plop and cum starts to flow out of her mouth

The woman looks up at the man and says" thank you for coming in my mouth sir.".