"Derek-" Stiles yelped when his mate pushed the plug in deeper, the tip of it rubbing hard against his prostate, making his hips jerk and his cock leak. "I'm gonna come so hard when I'm on your dick, when I'm on your knot, oh God-"
He grinned, preening at the compliments. He was glad that Derek liked his body, he was glad he was quite well endowed, because he'd seen on the Internet (okay, he really needed to stop using that as a reference) that a lot of omegas had pretty small cocks. But Derek loved his. Derek liked being fucked by him- it was the opposite of everything Stiles had imagined. "Fuck, I'd really like that. Nngh. When you're rutting I'm going to see how much I can make you come on my dick. As long as we're not too busy trying to get a baby in me-"
Stiles held his breath as Derek moved around, letting out a breathy moan at his new view. Derek really was beautiful everywhere, between his legs, his entrance was just- was it weird to think the tight ring of muscle was really nice to look at?
"Oh, such a good view," Stiles purred, his own fingers twisted in the sheets because he couldn't risk touching. If he touched himself he'd just try and jerk off. If he touched Derek he'd just pull him back onto his face and eat Derek out until he was a sobbing mess. And there had to be a different time for that.
"I'm so fucking hard," he replied. "Jesus Christ, Derek. Just look down, you can see how hard I am."
Stiles hips twitched up again as he watched Derek's fingers moving in and out, stretching, leaving a shiny smear of lube. Twitched because they desperately wanted to buck up into that tightness. Because Derek was always so tight, and he always would be, no matter how often Stiles got to hold him down and fuck him. Derek's body would slip back to tight.
"Oh God," he moaned at his own thoughts, feeling a warm trickle of precome on his belly. "Derek, Derek, nngh, look at you. Look at how lovely you are. I can't wait to be buried inside you. I just want to press my face there, want to have you moaning for me; what to feel you tightening around my tongue."
Stiles didn't care that he was rambling, he didn't care that the words he was saying would probably make him blush if he tried to say them in any other place with any other partner. Derek needed to know how much he wanted him, he needed to know how desired he was. Just because Derek was an alpha, it didn't mean he couldn't get the same care and praise that Stiles got.