pleasure he feels when breaking them, exercising his dominion over his prey
He's basically one of the most unconventional characters I've known. The fact that he is really an unpredictable character is one of the reasons why I'm fascinated with him. He's also a very selfish one, and he doesn't like being the underdog in any battle he enters. The way he was enraged when the spiders united against him in his fight with Chrollo, I think he doesn't like being the helpless one in battle (that's why he doesn't challenge those people who he thinks he can't defeat—Netero). As for Machi, I don't really understand what he really felt for her. I mean, he could really kill her at that time (after he revived himself), but for some reason he didn't. Maybe he was kinda really attracted to her (?). Well, no one really knows what he will do next.
(I really laughed when I read the coitus part, ahahaha I remembered our dear expelled instructor who really gave us a hard time in understanding ourselves way back then)
Netero's scene is excellent, well most of his scenes are, I will dedicate something to it. The interesting thing is that it plays with the viewer at that moment I think almost all of us thought that Hisoka could kill Netero easily, the weird old man seemed harmless and I think Hisoka noticed that this old man was not normal because his aura never changed having him in front of him. In Machi's case, I think that the way to express attraction beyond the carnal is suffering.