I would think your title would be the name. Sorry, I myself don't see it as hot. Strange maybe, hot no. lol
Update: You were right on the money. A horse tail buttplug is a device inserted into the anus of either a male or female with the intention of giving them a semblance of an animal tail, ... For sale everywhere. Just Google the name.
I've always found horsetail plugs to be funny-looking on girls. It's still really hawt to see a girl with one shoved up her ass, and that's always good.
you need to check out the porn classic "fashionistas" - Belladonna has to wear these several times and get all sorts of really hard sex acts done to her, and a gorgeous black babe gets made to wear one and is tied up like a horse and fucked really hard