Female MC definitely has the more weird/extreme fetishes in the game. If you like more futa or bestiality or tentacle content then the female MC is definitely more for you. You might want to check out Redkinght's walkthrough and see if any particular scenes or fetishes are more to your liking than the others. It's posted in this thread, you'll just have to search for it.
Interesting thing about this game is that you can skip/avoid all sex scenes. You can even kill off companions and not except their help. So you don't actually have to play as a "harem simulator" if you don't want to.
In Veralia there is a Prelek that is guarding the northern exit from the town. Go through that zone, you'll come to another zone that has a crossroad, east or west. Go east and exit the zone. You'll enter another zone., keep going east, and you'll go past an orc/Murkhal encampment, at the far east of that zone you'll come through another exit. Keep going east, and go slightly north and you'll find the Naga, and have a sex scene with her.
I have a male soldier save from the beginning of Act 2. You would have to save edit it to the farmer origin though.
Try not to post, and quote random people, like what you did in the second post of yours. Begging for help repeatedly/erratically like that, and not waiting patiently, you can get reported for spamming. Keep your request respectful, and don't derail another conversation by butting in like that.
As for your question the castle vendor is Ciiraci, the potion maker/chemist, she is a nexilim. You can save her in Ornesse, and then you can accept her services in the castle throne room. Although in version 4.8, I don't know if she caries the special anti-pregnancy potion. Try out the shopkeeper, where the Summerheat Club is in Summeredge. She sells them in version 4.8.
It's only in the male MC routes. The female MC routes don't have any. There's really only two dickgirl/shemale on male scenes. (As of 4.8). The other scenes are more male on futa/dickgirl/shemale.
That's strange, you'll have to save edit into your inventory or edit a switch/variable. You can use
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, a website for save editing, or I posted a RPGM save editor in this thread. You'll have to search for it. Download the save editor, and use it on your save file. Sadly there is no search option in the save editor to search fr a particular item. So you'll have to manually search. If you're still stuck after looking, let me know, and I can take a stab at it.