Will be traveling F on A380 and just wondering how do they allocate the use of the shower facility on flight. I read each person is allocated 20 mins but shower time is only 5 mins, but how do they arrange who goes first? Is that something you book with the FA before take-off or do they just allocate everyone a time and they stick to it? I presume most people will want to shower before getting off the flight, but 14 pax x 20 mins means some people are going to shower and then go back to sleep!?