You know what they say. When in Rome, do as the Romans. In this case though, Hinako did not have to be in Egypt to preform an arms crossed sarcophagus style mummification on her sub. She did modernize it a bit by including a pair of nipple domes in the mix. But she inevitably kept it old school with a classic tease and denial on her victim. If nothing else, he will go to the afterlife happy.