. . . There was also that one with Zefram Cochrane where they determined the entity was female by its 'feminine' behavior patterns, to which Cochrane was horrified. That was just plain stupid.
In "Metamorphosis," no one knew the Companion was female -- or, indeed, that it had any gender at all -- until the universal translator gave it a feminine voice. That UT must be a pretty powerful device, to recognize sex characteristics in a non-corporeal entity!
When he realized the nature of the Companion's feeling for him, Cochrane became horrified and disgusted by the thing's "alien-ness," for lack of a better term. Which I agree seemed stupid. I mean, the entity is just a cloud
. It's not like it was some slimy buglike creature with tentacles.