Work just the head of you cock for a while. Think about my lips being around the tip, playing with it with my tongue.
Go back to stroking the length of you cock. Imagine my mouth engulfing it. Do you want me to stroke it while I lick the top or do you just want grab my hair and fuck my face?
Close your eyes and picture me sucking you off the way you like. When you think you are about to cum, stop stroking and move on.