Can you answer any of the following questions?
What do you think happens when a girl uses a shower and a changing room in a school?
Or to break it down :
What happens when shower water is applied to children using a shower?
What do you think happens after that?
Do you think the child walks into their next class still covered in the residual of the shower water?
Is it possible that the school has an expection that the child applys a remedial process which would result in the child removing the residual shower water before attending the next class?
What may this process involve?