Giggling thinking about Derek getting his first ever bottom experience and Stiles is going about it like it’s his mission in life, he’s planned it all out, he’s gonna make this so good, so chill, just relax Derek. I gotchu. Close your eyes, is it okay if I touch you here? What about here? You’re gonna love this. Trust me. It’s gonna be so awesome. Are you relaxing? Do you want another pillow? Derek is getting slightly annoyed, huffing and rolling his eyes, because seriously, he does not need all of…this. He has a lot of attitude against Stiles’ whole…routine…whatever the hell he’s doing. And when he finally starts doing something, Stiles is being ridiculously careful, perhaps trying to reciprocate, trying to be as gentle as Derek usually is with him, and Derek just can’t understand why. He can’t get hurt the same way Stiles can. And it’s slow– so fucking slow – Stiles trying to get Derek to relax, but the softer his touches are, the more restless Derek gets. He’s barely gotten one slick finger working its way in and out when Derek decides it’s enough dillydallying. He grabs Stiles’ hips firmly, and drives him down hard between his own legs, pressing him forcefully into his own body, impaling himself on Stiles’ entire length… And knocks the air right out of his own damn lungs from the jolt of pain that goes through him. It’s an entirely foreign kind of pain. It aches and burns where his muscles have been forced to yield, and his eyes prickle and he actually has to choke down a whimper while Stiles looks at him with wide eyes, mouth hanging open. But after a minute of adjusting and breathing and Stiles being unimpressed with him for hurting himself, it starts to feel better. And he tries to get Stiles to move, grabbing at his hips again, but Stiles makes an actual growling sound, one that makes Derek shiver, before he takes hold of Derek’s wrists, pinning them down. No. Stay down. I’m gonna fuck you slowly, and make you feel good. Do you understand? And finally Derek relaxes and lets him.