"Still, you have to go to dinner." Marcus wasn't really one to talk - he could get lost in an experiment and go until someone dragged him away and reminded him that he had to do things like shower and eat. But when he was focused enough to think about those things, he was happy to help his dormmates do the same. He understood getting lost in something and forgetting.
"Come on, we'll both charm our ties purple, and that'll be that."