uardian Design/ uardian Design/Getty ImagesThe hill I will die on: Bum gun, bidet or shattaf – whatever you call it, install one nowMona EltahawyReally, why wouldn’t you wash yourself after using the toilet? If you won’t listen to me, then listen to Zohran Mamdani – and get your straddle onThe first time I heard a bidet mentioned in the US – or at least what it’s used for – was at the start of an off-Broadway play I saw in 2015 called Threesome. An Egyptian-American couple are in bed waiting for a white man they’ve invited to join them for the tryst of the title.