So you just called up a spirit, and it appeared to you in a form that wasn’t what said spirit generally is associated to appear as (EG: Lucifer appearing as a woman), and you are now super confused/aroused/excited.
Spirits aren’t limited to being only one ‘gender’. Every spirit can manifest masculine and feminine aspects. Take Baphomet for example, the very poster child of a balance between masculine and feminine (or being a tranny maybe?). Spirits appear how they want to appear, and even if the spirit you are calling up is - for example - Apollo, the Greek Sun God, he can still appear as a woman if he wants to.
So don’t be surprised if a spirit decides to mess with you by appearing with a big 'ol pair of tits instead of a thick meaty schlong.