"Well, there are so few people that I tolerate, so I have to feel concerned for them," Amy deadpanned. "If you got yourself killed for being a 'typical guy' my preferred social circle would take a hit."
See, even concern for ones friends could be properly Slytherin if you shined the right light on it.
Amelia merely cocked an eyebrow at him for the swimming remark. She hadn't considered it, actually, but the idea was not without merit. Continuing on, she added, "Because the squid has a taste for Prefects, haven't you heard?"