[Nymph Philosophy] Why the nude female form?

[Searcher]

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And why the gravitation towards female? Because words like anima, alma, sele.. are female?

Hi Koen! 
I wrote about it in You are not allowed to view links. Register or Login to view..
Excuse me for my lazyness, I'll just quote a fragment:

In the meantime, the soul is commonly depicted as being female in ancient Greek literature, for example, the Greek You are not allowed to view links. Register or Login to view. ([i]Metamorphoses[/i], Apuleius of Madaura), also it is feminine in gnostic writings ([i]On the origin of the World, Exegesis on the Soul[/i]). Notably, the word [i]Psyche[/i] [Ψυχή] in Greek, [i]Anima[/i] in Latin and in many other languages is feminine in gender.

While the Christian society believed in the close connection between the soul and the body, including gender, discovered in that time hermetic and alchemical teachings displayed the division of all things (duality): the Soul – female, silver, mercury, Moon; the Spirit – male (Divine being), gold, sulphur,  Sun.