It isn't the sort of thing that would occur to him organically, alas. It isn't the sort of thing that bubbles up to the front of his mind, even when working on a potion like this--even with the hormones of everyone around them clearly beginning to go haywire.

His attention is too reserved for getting pointers from their professor on the quality of the potion. His mind is too full of the various future paths still under examination.

They're alone in the fourth year's room when he lets his mind wander back in the right direction. "--really clinging to you, isn't it."