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He’s good in bed if…

1. He bites his nails. “Nail-biters push themselves to the limits (hence the stress-busting biting habit) by pushing boundaries and going to extremes,” Cox says. That’s kind of a surprise for all of us — who would’ve thought?!

2. He’s bilingual. “It implies intelligence and effort,” Cox says. Two very, very attractive traits that could certainly boost the quality of your sexy time.