You might be on to something there... having an ass fetish has always been a perplexing one to have imo, the clear interest in an orifice solely dedicated to waste would seem ridiculous without also having a fetish for the waste... i've always found that somewhat paradoxical to my particular version of the fetish... I also have a distinct love of female urine, but that is at least not so repulsively dirty and if the girl is well hydrated it is pretty much just slightly salty water, which is the type of have the full desire for, yellow pee is only appealing to be showered in, not to drink... you know, thinking about it, there might be a connection there, see, i consider a girl's pee and consuming it to be highly intimate, the only way for water to get into the bladder is via the kidney's filtering it from the blood, so any pee someone has has naturally been circulated throughout their entire body, you'd be drinking something that has been into every nook and cranny of their being, if i take that particular focus point as a reference, given how erotic that knowledge is to me during the act, then perhaps that is what is going on with this image, it's the contents of another part of her body that instead of being drink, is food, the other half of consumption, warmed by her body, passing through the whole length of it, delivered to me to then consume... yeah... that tickles some connections in my animal brain... fasc-o-nating...
Was not expecting this train of thought and personal discovery today...