Note: I wrote this for a prompt over at the Sherlock kink meme. The OP requested only good authors. This was my best effort. You can also find this at my livejournal along with a link to the original prompt. My livejournal name is snippy2yourcapt. I'm sure you can find it okay.
Sherly and Jo (short for John, obvs) went to the beach. The beach was pretty and the water was cold. Sherly didn't like to swim because it made his balls get shrunk a lot and that felt not good.
So they lied on the sand and Sherly complained that it was to scratchy and it was getting in his private areas and he didn't like that either. It was like shrinkage, but ichier.
Jo was annoyed because Sherl complained so much and he liked the beach so much so he huffed off to find ice cream.
Oh no! He stepped on a jellyfish and it stung him so it hurt! Ouch! John sat in the sand but Sherlock heard him when he yelled from that jellyfish sting so he came running to see Jhon holding his foot and writhing from the pain and he was afraid because he didn't know what to do!
"Sherlock you have to wee on me." John looked like he had pain in his foot. Sherlock couldn't look at him
"John I cant I have shy bladder." Sherlock said embarrassingly.
"but it hurts so much please make it stop." John pleaded.
"Okay I will try."
So Sherly whipped out his privates, exposed them to the cool sea air. He tried to wee. He couldn't. Oh no! He had to make John feel better now!
A second later he relaxed and let his bladder start. He aimed bad and missed Johns foot. He hit his chest on accident. Although he fixed it and then hit John's foot instead.
At first he thought John would be mad that he pissed on his chest on accident, but John moaned and he sounded like a cat when he did it, so Sherlock thought that sounded good.
Then John was horny. Sherly noticed from his cock bulge in his swim trunks. So after he finished having a wee on John's foot, he began stroking his prick and it felt really good.
John looked suprised at first but soon he fumbled to get out his own swollen member and began tugging on it ruthlessly.
He watched John move the foreskin over the tip of his red penis. It was so hot. It looked like a huge sausage and he really wanted to eat it, but he didn't think John wanted him to eat it, so he just pictured what it would taste like. Maybe sausage.
Pretty soon John moaned and he came hard he had thick ropes of come splash him in the face, covering him in a white mask. Watching John's O-face was so hot that Sherlock came closer and came really hard on John's face. Then John had lots of come on his face. It was hot.
Then they went home to 221B baker street even though it was far away. And they had lots of sex when they got back. So Sherlock thanked god For that jellyfish at the beach. It was awesome
The end!