Wait for at least a nod of assent. And, as I say, we humans have the same centres in the brain as do kittens. Of course, we cannot ask it. But it seems to me that Nature generally makes pleasurable what is necessary. When you are hungry, eating is necessary, so it is a pleasure.
Sex is necessary for the preservation of the species and is therefore also a pleasure.
When you are thirsty or sleepy the necessary actions of drinking or sleeping each have been provided with their measure of pleasure. The kitten certainly looks happy . I think we may presume that since it is necessary that it be carried by the neck it will feel at least a measure of pleasure in it. And we humans have the same centres in our brains. Recall that she or he is still having to keep eye contact with you, looking upwards at that uncomfortable angle.