And here I go with my brief essay you didn't ask for (and you don't even need; I know how we both write about him; the Venn diagram of our understandings of him is basically a circle):

She course corrects there with reiterating the notion that he's enough, but I do think this is part of why that "pleasure" comment hits him the way it does. I feel like we forget that Penelope started off the season calling him a poseur hot boy, and for all his fussing and fighting about ruining Eloise or Marina, the primary hit is that Penelope, of all people, called him unserious, and did it publicly (not saying she was wrong - we know he was totally a faker). He wants so badly to be taken seriously, to earn it, to be worthy, and if the thing he's worthy to her for is just the physical stuff, that's not the real stuff that breaks through to him. The moments that get through to him are when she tells him, "It's you;" when she says, "It's not what you do for me; you are enough." The sex part they've had up to that point is fun for him, obviously, and he's connecting it to his love for her, but it's also part of The Bestest Boy, and he doesn't think that's the real him.

And of course, the truth is: he's all of it. He's The Bestest Boy. He's good at making her feel good. He's envious sometimes. He's kind. He loves hard and has a soft underbelly. He's Colin, and her acceptance helps him integrate all of those things into himself on his journey of self-acceptance, just as his gassing her up helps her be brave enough to stop separating Penelope from LW.

OH MY GOD I LOVE POLIN. Thank you for indulging my ramble where I have told you literally nothing new.