Please tell me your thought.

Buster's cousin Elliot, a 15mth toy poodle, literally walks all over his owners, if they are sitting on the lounge he walks over the top of them and climbs onto the back of the lounge and practically sits on their heads.
When they are in their bed he walks up and down their bodies as if they are his mattress to get where he wants to go.

Is this a dominance issue and should they try to prevent it or is this just normal behaviour?