It's important to remember that the biggest reason the MC is so weird and sexually harassing isn't because he's an orc, because orcs seem perfectly willing to find just one nice girl and settle down.
He's the way he is entirely because of his human mother, and what she taught and encouraged him with.
And that's part of the comedy of it. This is really entirely her fault. She's the one who put all these ideas into his head. She's the one who pulled strings and got him the tutors and teachers at the start, who turned him into what he is. This is, 110%, on her.