After I collected Chase's cum sample off of my chest I told him in order for the success of this fast and efficient test we need to have my cum for comparison. With that I guided his head towards my pulsating dick and had him go to town. He engulfed me and formed a suction around my cock that made my knees buckle. Watching his head bob up and down; disappearing in his mouth was the highlight of my day. Chase pressed his tongue under the head of my cock and ran it up in to the slit of my dick. Then focused on the shaft and then began to lick and pull on my balls which got me hot and heavy. This kid was sucking my dick with so much intensity that I had to fight off the urge from busting in his mouth to soon. He brought his focus back on deepthroating my cock; I loved the feeling of my dick down his throat. I grabbed his hair and pulled it further onto my pole till he got red in the face. I started to feel my body tingle and my balls began to get tight. I curled my toes while I tried to last as long as possible and then I pull my cock out of his mouth and busted all over my chest. I then brought the test tube to my chest to gather some of my cum and compared both cum samples side by side. My prognosis that Chase was totally fine was correct and I told him he could come back anytime he wants.