"How to Build a ___ Room" (Netflix interior design show highlighting people's fantasies and fetishes) (3)

I believe the answer is:

sex

(Other definitions for sex that I've seen before include "Male or female" , "VI (Lat.); m. or f." , "Gender" , "Expert in the treatment of coital problems" , "This symbol is epitome of glamour" .)

I've seen this clue in The Washington Post.

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