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When a girl is giving a hand job and also blowing a guy at the same time. When he cums, she hits him in the nuts so hard it feels like a jack-en-sack and makes his cum feel like a fireworks show.
He was cumming like a waterfall, then she hit him in the nuts like a brick. It was a jack-en-sack explosion!
He was going for double action, but she added triple pain. Jack-en-sack for the win!
He was moaning like a baby, then she socked him in the nuts. Jack-en-sack, baby!