Where are fairies????

Yes! 

Throat singing two tones. High and low. Monstrous growl.😈🙂

While I've recently replied to a post about Fairies about this, the post was a bit more focused on why we need them in the game as opposed to why they are not in the game yet.

I theorize their wings are likely one of the biggest problems the Developers are having. If you look at Werewolves, they have short, knubby bob-tails. This was likely their solution to allow Werewolves to interact with objects seamlessly. Furniture is the biggest problem. Seating and lying positions plus a tail, is hard enough. What are they to do with large wings that protrude from the upper back? Certain social animations would have a lot of problems with wings, such as hugs, massages focused on the shoulder, whoo-hooing in certain things like beds, blankets, bushes and such. Unlike Werewolves, however... you can't just shrink a fairy's wings into the size of a butterfly and call it a day. 

I do think of the fairy costume that does have wings in the back, but I haven't play tested it to see just how much the wings wind up having things go through them as though they are not really there.

The other thing is clothing and hair compatibility. The same thing with objects, wings might not work out well with certain hairs styles and clothing. You can't have wings sprouting out the middle of a braid or ponytail running down your Sim's back, now can you?