Severus scoffed at the words, amused partly, did he need to defend his house? He just didn't care now, did he? "That's not a matter of houses, it's about single wizards." He said, adding a bit of sugar to his tea, and stirring it for a while, hoping it'd cool faster.
"I don't need any sort of opportunities." he muttered simply and shook his head: "I was just surprised... I enjoy the solitude of the staff room during the night, nothing else."