I am gonna say it, when it comes to centaur girls you gotta go with frontal pussy even if anatomically speaking it makes no sense for the vagina to be there
Otherwise you are just fucking a horse, look how far away on the back he is, he can't even grab a titty, plus it is not even a meet you in the middle kind of pussy, it is a full on horse vagina that requires a horse penis, it is all downsides
I know what you will say, "what about mermaid style with the centaur lying on her back?", that's better but that still leaves all the good upper human half parts an entire horse away from you, at least you can look at tits that way, but still, I don't think it is worth the hassle, and for pony centaur girls, it would have to be a really small specimen
Busty centaurs have been quite popular lately in anime and manga, but think about it, once you get down to it, you are stuck just with the horse on the back
I know I am gonna get a lot of flack for this, but someone has to say it, centaur girls are on the lowest tier of monster girls to fuck