Where have you learned this? Exactly from what section, paragraph and phrase in the JOS ( http://www.angelfire.com/empire/serpentis666/HOME.html ) state that?
If you did not read that from the JOS then you need to read it to learn the truth about the Gods and Goddesses [Male/female demons] of Duat.
Clearly the answer to this question is no.
Hail Satan! From: aftiel_tk <is2007.kara@... To: Sent: Saturday, May 4, 2013 11:21 PM Subject: Summoning female demons
I have read that some female demons will assume a male form, often intimidating, before taking on their true image. Is this true?