Bel has gone though long periods of his life where he felt like he had to fight for any sort of affection or physical touch: Caldera being a place where it comes so easy to people is one of its appeals. It makes it easy to give it to others, knowing he's not pouring himself onto bare stone; whatever he gives will be returned. "Of course."

He couldn't do much with the hand beneath his body besides keep a hold of Barcus's back, but his other hand could explore, running down Barcus's side, to his hip and thigh. "Like that?" Easy enough to let his fingers trace lines on the back of Barcus's thigh, where it joins his body, to feel the response before he even hears the words. To wonder what his arms can reach without asking Barcus to move.