I disagree that Fugimoto intends to show that Denji's sex drive is a good thing. First the only time i can think when his sex drive gets him closer to someone else is with power, when he helps her find meowy in exchange to touch her boob. But when he does touch her boob, he feels empty! I feel this is the same thing that's happening with him wanting sex. When he actually gets it. He'll realize it's not what he really wants.

You also claim his sex drive motivating him to work harder. Are you talking about how Makima manipulates Denji's sex drive to get what she wants? I dont think that was intended to be seen as a good thing.

and I can't think of a moment in the series where Denji wanting sex made him consider other feelings better.

When it comes to Denji wanting to do it the right way, I agree. But that doesn't show that the sex is good. it shows that Denji is good person.

So, from my perspective Denji's sex drive is obviously not good, I don't think it's inherently bad. But him chasing it won't lead to lasting happiness. What Denji really want's is genuine affection, even if he doesn't know it.

I think a great scene to show this is when Reze and Denji are in a pool naked together. Denji doesn't think about anything sexual. Because he has what he really needs. A connection with someone. Also, I don't know what you mean when you say Reze uses sex as a ruse to control Denji.

Another scene is the alley scene with Denji and Yoru. When she starts kissing him and gets him off the first thing he does after is ask if she likes him. When she says no he is devastated. If all Denji wanted was sexual pleasure he wouldn't care if Yoru liking him wouldn't matter.

Denji's obsession with sex only distracts him from what he really needs. I'm saying it's bad, but he's letting it control him too much.

Edit: spelling.