What feels good to a snake?

[Teal]

I believe that snakes can recognize certain people, and associate them with "good" things like food and/or heat. I have seen snakes initiate interaction with people, and I really couldn't tell you why... climbing out of their temperate enclosure to travel on a person, for instance. Following a person around the yard, as well. I'm sure all of these instances are the result of a primal sensory like heat and/or cover seeking... but the snakes are not distressed in any way during the reactions, so that's a "good" thing then, yes? Indifferent is better than negative.