What is the technique to make the cum dribbling without twitching or squiring during ruin orgasm?

Hi everyone,been watching some ruined orgasm videos,notice that some guy manage to make their cum dribbling without twitching or squiring during ruin orgasm.Does anyone know the technique to make such happen? Get your own Orgasm Control toys: For men: http://www.amzn.to/1V6XQvv For women: https://ift.tt/1UWn54n