James does only what he wants, narcissistic. He likes to stick to you, James overly loving, but he's absolutely sure that you don't mind it. Jack, on the contrary, is a guy who rarely shows his emotions. He doesn't like to express his feelings, but there is a downside to this, the more he tolerates, the more he explodes later. Jack is overly caring and pedantic, sometimes you and James both feel like children next to him. Twins are ready to share you only among themselves.