He tried not to laugh himself as Kyle did so, which he succeeded in mainly due to focusing on how wonderful it was to not have his dick be trapped under fabric when it was hard and he was being pinned down. Because to him, that was quite a wonderful feeling indeed. So, instead of attempting to chuckle, a slight gasp was heard instead as he moved beneath him and bucked his hips upwards.
He was definitely enjoying the lack of a serious nature to it, though. It made it feel so much less like work or something for survival. Like playing with your food if you were a gourmet.