I'm conducting an experiment and it just so happens that I need a sample of fresh cum right now. Can you provide some for me? What? You can't cum jerking yourself? That's useless to me, I've got no choice but to milk you myself. If I stroke like this you can cum quickly right? Not enough? You need my mouth too? I'm getting impatient. I have no choice but give you a blowjob of a lifetime so I can finish my experiment. Now come one, cum already!