The Last Straw
"Severus, for the last time, would you please remember to put the toilet seat down when you are done!" This statement was heard echoing the dark, damp dungeon walls far too often the past two years since the Potions Master and Hogwarts' newest Transfigurations teacher Hermione Granger (now Snape) had been married. This statement was usually followed with a somewhat noncommittal grunt of a semi-apologetic, "I will remember next time dear." But of course, he would 'forget' again next time.
Well, enough was enough as far as Hermione was concerned. She was finally fed up, sick and tired of trying to deal with the toilet seat suck in its non-original and upright position every time she wanted to use the loo. She had been talking to her friends and it seemed that they were not having such a big problem as herself. Ginny had trained Harry to put the seat down after use. Luna had trained Neville. Even Susan had somehow managed to train the impossibly hard headed and highly habitual Ron to put it back down when he was done. She just didn't get it. She had done everything she possibly could to make the man remember that the toilet seat should be lowered when finished short of swatting him with a rolled up newspaper.
Finally she decided that the spectrum from gentle persuasion to nagging him about it was not going to work, so she decided that she was going to have to get creative. After thinking about what she could possibly do to help encourage the outcome she wanted she was suddenly hit with a bolt of inspiration. With an ever so slightly evil grin of one who has a terribly naughty idea, and a twinkle in her eye that could rival any from Dumbledore, she gathered her things to go out one Saturday and apparated to Diagon Alley. She had some visiting to do with the twins and a favor to cash in from Fred.