Seth Rogen and Charlize Theron dished about their obsession with “The Bachelor,” and how they were left perplexed by a contestant who had never been kissed. That led to Charlize admitting she used to practice kissing on her “arm butt,” and showed Ellen and Seth her fascinating technique. Seth also explained why Charlize was his top choice for his co-star in their new political comedy, “Long Shot.”

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