Adrian leaned into Stephen's touch as much as he could, welcoming it. He listened to him speak, taking on board what he was saying because they were things they hadn't played with before and it was better to be safe than sorry with things like this. If he decided he didn't like it and freaked out, it'd likely be the end of the scene and he didn't want that... He was enjoying himself.
He pulled on the cuffs when Stephen stepped back, trying not to pout. He didn't complain though, turning his head back to the cross and waiting for the flogger to hit his skin, the tails starting to burn after a while like Stephen had said. He still arched into them though, feeling his skin burn hot, the smacks on his arse a surprise but still pleasurable, his body starting to compensate for the pain with endorphins.