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Swayze's dance training was central to his heart-throb appeal. In Dirty Dancing, dance is clearly used as a metaphor for sex: young Frances "Baby" Houseman (Jennifer Grey) learns how to dance with Johnny, and as they come together as a dancing couple, they become a sexual one too. For that to work at all it's not enough that Swayze looks really buff (OK, it's a big factor): he has to establish a physical rapport on the dance floor, otherwise we won't believe it's there in the bedroom. Dance training is vital for that. Compare Swayze's slow-burn smoulder with, say, Arnold Schwarzenegger's graceless fumblings in True Lies. Arnie is going through the motions and so his partner has to do the same; Swayze and Grey are coming together.