From what i have seen of the videos, the poses there for tannies as it stands, are really just female poses.. you notice this when she reaches back and her fingers slip into her balls where a vagina would be if she was female, rather than rub a non existent vagina, she should stroke herself while she's being taken.
It kinda seems the trannies were an after though part way through the development.. or maybe even near the end of development.