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Sophie Turner is shedding light on her preferences in the bedroom ... candidly confessing on whether she identifies as a top or a bottom in bed.

Check it out ... while reading a thirsty tweet from a fan -- who expressed a desire for the "Game of Thrones" actress to "top" her -- Sophie wished she were actually a top. As she put it, being a top would be "a dream come true," but she, disappointedly, revealed she's more bottom.

For those unfamiliar with these labels, Sophie is essentially saying she's more submissive receiver than dominant giver ... while gettin' busy.

However, ST isn't ruling out a change in her future ... assuring fans she'll update fans when or if that happens. Gallery Launch Gallery Getty

Sophie's NSFW confession comes amid her ongoing roman

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