Hayun's not been interested in anyone enough to go any further than a few rather chastise kisses here and there so he hasn't really explored much further than that. He's never even really explored his own body or watched porn (though porn would've just left him with more questions and a poor understanding of how everything works). He knows the general mechanics but had no reason to look deeper. He figured he could once he got there, but now he's here and he wishes he knew more.

"Explain it to me as we go. It might be easier to digest then, you know? Explaining it all to me right now might be a little overwhelming." It feels weird to casually talk about something not so casual, all while Yohan and rubbing his dick with Hayun's hand. Something that Hayun's not been able to stop watching happen until the fuzzy fabric since he looked back down.