Website. Thanks to DGSF Justin, via As-Found. It ain’t new, but I figured it cannot be ignored. Some of the fan erotica on the site evokes the fetish:

“You look great,” Steve said, having taken in Kim’s luscious boytaur muscle bod, which he’d decked out perfectly in crisp four-legged jeans and a tight black tank. He wore no shoes, revealing the extra toes on his four tanned feet.

They kissed for a few minutes, Kim’s four hands stroking Steve’s back, and then Kim pulled back and said with a grin, “How come you’re not changed? Everyone’s waiting to see the hottest boytaur of them all!”

Steve grinned back. “Didn’t bring my clothes with me,” he said. That wasn’t really true. He liked changing here, and so had deliberately waited.

More images (SFW, though the site is extremely NSFW):