"Yeah, I need it"

“Yeah, that would be great. Where do you want me to go to do it?”

“Well you can do it here. I have to watch you and collect the sample.” She could tell by the look on his face that Jake was surprised. “Is that a problem?”

“No I guess not. Just sort of embarrassing.”

“Well, you’ll get used to it. There are some pornography magazines in the drawer next to you, or just call up what you like on your phone. Whatever you prefer. Now go ahead and strip and get down to business. Just do it like you normally do.

Jake peeled off his clothes, lowering his underwear last and letting his mostly hard cock pop out. Jake had a big cock, thick and almost 8” long, with a fat head that was already dripping precum.

Jess’s eyes opened a little wider as she took in his massive cock, and her looking at his cock caused him to swell to full erection, his hard boner pointing almost straight up. How wondered how good it would feel to fuck the pretty girl and stroke her big tits as he shot his load into her tight pussy.

Jess kept talking and brought him back to the real world, “Ok, well that was unexpected. Let me show you how to use the collection cup and then you can provide the sample.” Then she pulled out a small silicone flexible cup with a long neck and flexible rim at the top. It looked kind of like a very loose condom. “You just insert the head of your penis in there when you are ready to orgasm and then ejaculate into the specimen cup. The lips of the top are designed to fit snugly on the head of your penis to allow leak proof collection.”

First let's get you measured while you are at your biggest. She pulled out a soft tape measure and rolled it along his stiff cock, her hand holding it steady as she rolled the tape over his shaft and cock head. OK, just over 21 cm about, 8.2 inches. That puts you in the top 1% of males. Now let me measure your cock’s erect girth, just over 20 cm, or 7.9 inches.”

Then she grabbed his hard cock pulling it down a little, Jake felt like she was giving him a hand job as she squeezed and jerked his cock. Then Jess rolled the top of the silicone cup down over his fat cock head. As she did this Jake could see down her loose top and saw she was not wearing a bra. Her big tits were swinging free, her light, pink nipples erect. She still had a firm grip on his thick cock and he started to cum as she fit the cup on his cock head, rubbing her fingers on the sensitive head.

“Fuck I’m cumming,” he moaned as he grabbed his cock from her and jerked off as he started to ejaculate. He jerked his load into the cup, shooting 6 long stings of cum.

Jess stood and watched him fill her little cum cup. She was amazed at how big his cock was, and she had to admit to herself that he was kind of turning her on, her pussy felt more than a little wet, and her nipples were hard bullets on her big tits.

“Well, that was fast,” she said with a smirk.

Jake felt embarrassed again, “It’s been a while and you got me all worked up with your questions and collection cup. I normally go quite a while before I bust my nut.”

“Yes, I apologize for judging you. I am here to assist you, not make you feel weird.” She pulled the collection cup off of his half hard penis. Then she held the cup up and said, “Wow, you unloaded almost 15 ML of ejaculate. That’s the most I've ever seen.”