I've stuck on the TV for my son to watch while I have a quick shower, usually he'll sit and watch until I get back (5-10 mins), mid shower, he's come in, flung the window open wide and pulled open the shower curtain, I was on full display and almost screaming, neighbour out in the garden reading looks up to see what all the commotion is all about, only to get an eyeful of all my lady parts on full display for all to see , drastically scrambling to grab the shower certain or a towel 
I can clearly never go out again :| my son is still in hysterics