Answer:
Addictive
Step-by-step explanation:
Addictive means to be addicted to a thing.
A person who has an addictive behaviour always wish to do the same thing or carryout the same acts that he/she has been doing everytime without been fed up because they are addicted to that particular thing in which if they stop it their mind will always be in that particular thing until they return to it.
Example of addictive is when someone cannot stop taking a particular food or drug because they are addicted to it in which once they start they cannot stop, they tend to always take that particular food or drug without been tired of it, leading them to be ADDICTED to it.
Therefore the case of Steve is an example of ADDICTIVE behaviour.