If he was more coherent, Neil might have corrected the other man. Jokingly stated that this is not permission but a non-rejection. As he is, he cannot think beyond the affection, the mixed sensation blossoming beneath his skin. He speaks his assent against the other's lips, the agreement that he would tell him if this becomes too much.

Neil doesn't understand until much later that this is the first time such an offer has been given. The first time he would be given a verbal choice.