He watched as she took off more of her clothes, the insignificant ones of course. But just the action itself sort of turned him on. He returned her kiss, settling into the couch and getting rather comfortable. He knew there was a large difference between making out on a couch and in a hallway, but tried to push those thoughts out of his mind.
When she put her legs in her lap, he instinctively rested his hands on her knee. He even thought about taking her feet and rubbing them, but refrained. Perhaps that would be to forward, because wasn't that what couples did? And they were definitely not a couple.
Curious as to what she was doing with his hand, he watched as she traced letters. He missed one or two, but was pretty sure of the message she was trying to get across. He took her hand as well and traced the answer B-L-U-E back into her palm. Yes, he may be a Slytherin, but that didn't automatically mean green had to be his favorite color. Getting the gist of what she wanted, he traced F-A-V F-O-O-D? in hers.