"Dios preservame," Jack mutters under his breath. Right. He needs to remember just who he's talking to, here. This is the person who had no emotions for most of his existence and doesn't know what a dog is.

He sits up a little straighter. "Desire is... when you want someone. No, that is just another word for... okay." Different words. Feeling words. Break it down to essential pieces. "Desire is when you look at someone and you want to touch them, want them to touch you. You want to put your hands and your mouth and all of your body on them, to make them feel good, and to make you feel good. It may seem like fighting sometimes, depending on the person and the mood, but there are more than just hands and teeth involved." Please do not make him talk about dicks directly, Serph. He can, but it will be embarrassing. "It is not a bad thing."

He pauses, then in the interest of being perfectly clear, he adds, "Unless one of the people does not want any of that and the other person forces them to accept it. That is a bad thing. That was not what happened in the oasis, though, I think?" His brows go up pointedly. He does not think it was, considering neither of them are acting like they were forced into sex, but it's probably best to make sure of that.