Final answer:
None of the provided '6Fs' exclusively pertain to women's bottoms as these elements are relevant to clothing design in general and not gender-specific.
Step-by-step explanation:
The question "Which of the 6Fs only pertains to women's bottoms?" relates to aspects that are considered when designing or selecting women's clothing, particularly bottoms such as pants or skirts. There is no widely recognized set of '6Fs' in fashion terminology or garment design that pertains only to women's bottoms.
Concepts like Form, Fit, Function, Fabric, Fashion, and Flattery or Flare could be relevant, but these are applicable to clothing in general and aren't specific to women's bottoms. Therefore, none of the answer choices provided exclusively pertain to women's bottoms as each element can apply to clothing of all types, for both genders.