Wear a chastity device while wearing a but plug as she massages my balls and ass.  That really gets me fired up, then a good pegging while still in the chastity device.    My cock can't get hard, can't be touched, then I flip over and she does me missionary until I beg for the cage to be removed.  Then we do a lazy missionary.
Agony and ecstacy all in one.  One time I wept for joy doing this.