As the saying went, Grandma lived to a hundred because she never got curious about things she shouldn't. In this Castle, Gryffindor hardly had a monopoly on courting death.
Sometimes, curiosity could kill a badger, too.
"Get out!" Snape roared.
Su Er scrambled out of the Potions Office. Fortunately, it was nearly midnight, and this was down beneath the Castle, so nobody could see his flustered state.
"Oho, so this is where Snape lives." Although Snape had been beside himself with rage just now, and had even wanted to lay him out with an Avada Kedavra, Su Er had still made it out alive.
"Should I just hide in the Room of Requirement for the next few days?" Su Er emerged from a dark corridor after completing his transformation, a paw propping up his chin and thought flickering in his lively eyes.
"All I did was see a photo of him with a girl on his bedside table. Surely the professor wouldn't be that petty?"
"Hmm... this is huge news. It'd absolutely rock the Castle! I've got to share this with Hermione..."
"Snape actually has a treasured photo of himself with a girl... ohoho... could she be the Old Bat's first crush?"
"Huh? Wait." Su Er suddenly caught on. "Snape, in a photo with a girl..."
"That girl was Harry's mum???"
"So Harry's mum was that pretty? But however I look at him, Harry didn't inherit her looks at all, did he? Apart from those green eyes..."
"What a shame. Harry, oh, Harry, if you'd inherited even a fraction of your mum's looks, Snape wouldn't pick on you so much."
Shaking his head and letting his thoughts wander, Su Er had already reached the Room of Requirement on the Castle's Seventh Floor.
After a practiced series of steps, he turned