The way ponygirls move is nice, but the suits themselves don't really excite me.
I've checked the site mentioned on the left side of the pic & I have to say she has worn better suits.
(check out gallery 322, 324, 333 or 334)
Not sure why making a beautiful woman look like a horse turns you on, but okay. Have fun with that.
It's about the control (& you can whip a horse... I don't think it's ok to whip a dog, otherwise we would probably have seen doggirls by now) & the movement.