"No." Senku agreed, looking thoughtful. "I did, when I was ten, work on a project with my best friend. I designed a suit for my dad that used electric pulses to make muscles move a certain way. It's not painful, but during that process, Taiju let me use him as a subject. A small little jolt of electricity mimics the impulses your brain sends and can make your muscle contract against your will. It's kind of neat, actually, and a pretty good way to study anatomy. The impulses allowed, with the suit, for my dad's body to teach his muscle the memory of swimming the breast stroke. He needed to improve his swimming. It didn't really help, but he trained a lot more than he would have. It wasn't my most successful invention."

He didn't mind babbling about science, even if it was a past failure. "But typically, I don't deal in human subjects at all. The only other science I've applied to people is medicine. Pain relievers, antibiotics, that sort of thing."