Tails. It seemed mundane at first, but the idea of girls showing off their wet pussys as they get aroused and their tails hike up their skirts, or men with long tails that stand straight whenever a hot girl is around. Oh, and they could be prehensile too, so girls could pleasure themselves just as easily as guys.
But Athena couldn't just wish everyone to have them. She needed to see them grow, see people deal with the new appendage. Her new fetish needed to be fed.
She fingered the stone. "I wish, that sometime in the next few days Jon will come down with Crescuntcaudae, a very communicable virus that causes him to grow a long, sensitive, prehensile tail. He can consciously control it when he thinks about it, but otherwise it will move instinctively based on his emotions. There is no known cure for the disease, and people will grow to like their tails."
There was a flash, and elsewhere Jon rubbed his tailbone. It felt sore for some reason, but he ignored it as he fondled his new male breast flesh.