He likes the warmth when he is being held by people. he often tries going into sleeves, or hoodies, or even women's tops and bra's/// I suppose he is a real male. Since they are cold blooded they do like the heat, and they will try to go where they will feel more secure/safe/secluded, so my sleeves are very popular, the hood of my hoodie if it hangs on my back, and around my shoulders or around my middle when it is a cold day and I am layered up. the he just chills there, I can feel how he starts to warm up, and then he is a bit more active if I handle him again.
No, corn snakes do grow a bit bigger, max size that they have been recorded is 1.8m, with a girth of about 16cm, then they should be healthy and well fed. But they also need that amount of space in their terrariums. So the rule of thumb is, two adjoining sides combined must be equal to or greater than the length of the snake. They are not arboreal, so they don't need high enlosures. Our terrariums are 40cm high with a bit of enrichment, we put some vines and wooden pegs into the back so that he can slither around and explore more, but a lot of breeders keep them in a stacking system, in plastic tubs. similar to the picture.