Klaus liked that Bill wasn't shy about pushing and pulling and taking what he wanted, just like Klaus wasn't shy about telling him exactly what he wanted as well, they worked well together like this. And Klaus was watching with hungry eyes as Bill pushed his thighs up, a wand ready for whatever kind of magic Bill would show him next.
And it was when Bill pressed a finger into him and Klaus felt how easy the press of it was that he realized exactly what Bill's magic had done and he groaned with delight. "Oh now that is wonderful." He tipped his head back hips arching already eager for more than just a single finger as Bill opened him up.
"I've been missing out all these years," He huffed, reaching out for Bill to pull him closer, ready for more of him, whether it was more of his fingers or the press of his mouth. "More." He pressed.