[Yusuke's brow furrows, tempted to ask just HOW that was even possible (just how far could that stuff extend to, anyway?), when Jonathan's question causes him to blink in surprise. Guess it made sense to ask since he was prying into Jonathan's stuff so much, anyway. He lifts a hand up to scratch his cheek, trying to give it some decent thought (or as much as Yusuke can manage, really)]

Uh... I can't really explain it, to be honest? It's kinda something everyone has, but can only use if you got a sixth sense or something like that. You can use it to make yourself strong, or patch yourself up, or make weapons and junk out of it. People got different types of it, too.