If you were fucking me like this and you started to cum could you pull out and hit my face from this angle or would it just dribble down my leg?
Do we need to practice some kegel exercises? I don't want you to miss your target, this may be your one and only chance to cum on a cum doll.
Let go of your cock and stand at attention. Now squeeze that muscle that you squeeze to stop peeing mid stream. Squeeze and hold for 3 seconds.
Now that wasn't hard, was it? Good.
Do this exercise 10 more times resting 10 seconds between each repetition.
When you are done reward yourself with 2 minutes of stroking with both hands at a medium pace and grip.