Dean was fast losing all hope of having any control over himself as Sam was doing that, and he tensed up, fingers digging hard into Sam's shoulders, his hips pushing up, heels digging harder into the bed. Almost flinching at Sam's mouth suddenly on his neck, he buried one hand in his hair, letting his hip be held down.
"Christ-- Sammy, you know you said this was g-gonna be over before it started if I kept talkin'? You keep that up, and ditto," he murmured out, his voice a little slurred from the pleasure. It felt weird, definitely, but it was really good too. Painful for certain, the burn made it sting a lot, and the slickness was a godsend, he knew it'd hurt way more without the lotion, but this was really incredible.
He tugged Sam's head up with both hands, catching his mouth with his own and slipping his tongue between Sam's lips, fucking his little brother's mouth with it.