It's the new trend with the scene couples. HE buys a bag of poprocks and gives it to HER who gets to suck his dick with a candy coating. Sweet for her, and one of the greatest sexual experiences for a man.
A specific term to specify the butt crack excluding the anus from the specified area. This is also in the song by youtube star, kruvi123. The song is called, "Pop, Crack my Head", although he made a typo in the title instead of popcrack my head.
In the action of intercourse...the man pauses...delicatley opens a packet of pop rocks and pours it into the vaginal canal. And then like a true gentlemen, he waits for the sizzle sounds and then promptly eats her out