When your lover is asleep, you cum on the back of their neck and then press the bed sheet there. Let dry for 20 minutes. Wake them up and see their cape fly.
when you are about to ejaculate when you are having anal sex or doing doggy style, you spit on the ladies back making her think that you came, then when she turns around splurge in her face.
"Dude, it was funny as hell, i pulled a Sneak-a-Peek on 'er", Justin exclaimed.