Safe. It's a form of the highest praise he can think of.

"Yeah?" He pants heavily, closing his eyes as he buries his face against Murdock's cheek with warm kisses.

It's hard to stay slow when he's like this, when he wants nothing more than to be eager and maybe a little rough... and then try to push himself for more. But, he manages only a little faster with each firm buck of his hips while his arms squeeze his partner even tighter.