“Persuaded by Hera, [Zeus’s] perennially offended wife, that if she was sleeping with a god she ought to have the satisfaction of seeing him in all his glory, Semele nagged at Zeus night after night to throw off his disguise and appear as he really was. Finally, exasperated and perhaps by now tired of her, he did and she was vaporised. It was no doubt their bad experiences with these two, Tantalos and Semele, that made the gods wary of getting too close to the mortals of later generations.”
-John Spurling, Arcadian Nights