[1] Aristophanes, Thesmophoriazusae 567 (web address 1), with comments from the scholia thereto.
[2] This sentence on the author's comments seems to alternate abruptly between the family of words relating to 'fleece' (po/kos) and those relating to 'braids' or 'tresses' (plo/kos, plokh/, plokami/s, etc.). The latter is probably what is referred to in this sentence. The interest in gender-specificity probably arises from the fact that the words are addressed by a female character in the play to a male character who is masquerading as female. The scholiast seems to think, perhaps correctly, that the humor lies in the fact that women have plo/koi and men have po/koi, which here is clearly a reference to pubic hair. (Likewise Lysistrata 448, where instead of the transmitted verb e)kkokiw= modern editions print the emendation e)kpokiw= by F.H.M. Blaydes: web address 2.) See also subsequent notes.
[3] Perhaps what is meant here is that by using a word derived from po/kos ('fleece'), Aristophanes is making a (false-)etymological play on the family of plo/kos words ('tresses', etc.), which would be more appropriate in a literal sense. The original scholion adds that the word-play is performed "pretty nicely" (ou) kakw=s).
[4] Again, the reference here is probably not to 'fleece' words but 'tress' words. No forms of po/kos or related words occur in the surviving texts of any author named Lycophron, but the Hellenistic poet of that name (lambda 827) uses plo/kos to refer to a man's hair (Alexandra 337). So the point would seem to be that in Lycophron the term is not gender-specific.