It was no skin of Noah's nose to offer. Cassandra was a year or two older than him, but the way apprenticeship worked at the Department of Mysteries, they'd pretty much been in the same cohort for the last few years. He knew how good she was. He wouldn't offer to someone who wasn't.
He nodded, "Right, though I'm not on Team Love for the record," he thought using that sort of thing - feelings, manipulating them - for coercive magic was wrong, even if he understand that as Unspeakables they all studied good and bad no matter the potential application.
Cocking his head, his eyes lit up, "You know, you've got something there. No one thought of coming at 'love' from a different emotion?" He was surprised it hadn't been brought up earlier in the study. "You know, though, something else you may want to consider - the opposite of love isn't hate, but indifference. There may be something there, too."
He looked once more into her cauldron and stood casually from his stool, stretching his arms high above his head in an attempt to crack his back.
"I should get back to my notes, I've really got to make some progress on this soon or the Department will Unceremoniously shove me through The Veil." He chuckled, "Good luck with all that, though, and don't go slipping it into anyone's coffee," he gave her a cheeky smile and headed back to his cramped little office down the hallway from the main workroom where she toiled away.
Very suddenly, a song was stuck in his head. "Toil & Trouble" by the Weird Sisters. Well, that was different.