5 minutes?! Even if I'm about to shit myself (which isn't too uncommon because I'm lactose intolerant and always forget xP) it always takes me at least half an hour

But I only bring my phone if I'm doing something on it and don't want to wait half an hour doing nothing, normally I just let my mind entertain itself x3

Also that would only be filthy if you don't wash your hands in which case everything you do will be filthy inside and outside the bathroom