Pretty much every couple that's committed itself to monogamy has the conversation: "If you ever had the chance to hook up with one celebrity and get a pass on it, who would it be?"

The relationship scholars at Groupola recently conducted a poll of 1,198 couples to find out: Who tops your list of guilt-free celebrity hookups?

Perhaps not surprisingly, former Transformers beauty Megan Fox tops the list for guys, with a whopping 72 percent of the vote. Equally predictable: Brad Pitt is the ladies' Number One choice, with 69 percent of women naming him as their choice.

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