As a returning team in doubles, you are in a defensive position and the serving team is in the offensive position.  When you lob over the net person successfully and then follow that high lob to your net position, you have gone from ‘defense’ to ‘offense!’  A successful lob is defined as a high ball clearly hit over the net person and the ball goes to the deep part of the court.  Even though the opposing net person ‘switches’ with their partner, they are now in a defense position and you are OFFENSE. Obviously, if you do not follow the ball to net, you are more neutral, but with practice you will break serve and really feel great.