He's tempted to refuse it. There's some part of him--and it might be simple masochism or it might be something else--that wants it to hurt, like if it does it'll stay with him for longer, burned into him. But he thinks about Neil inside him, thrusting into him, and he knows he shouldn't make this harder than it has to be.

"Yeah," he gasps, hand fumbling over Neil's around his cock. "Probably... good idea."