Effeminateness n. : The state of being effeminate; unmanly softness.

Example:
do straightmen get attracted to effeminate men?

Taxonomy
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Defination from the web:
Effeminateness in the Online Dictionary. Meaning of Effeminateness. Pronunciation of Effeminateness. Translations of Effeminateness. ... effeminateness - the trait of being effeminate (derogatory of a man); "the students associated science with masculinity and arts with effeminacy" ...