First, let me describe myself. I'm a 45 yr old male, single, average build.
I live in an apartment complex, where a swimming pool is the center attraction.
I was lying on a lounge chair, minding my own business, when I noticed two
16 yr old girls arguing. They're both in bikini bathing suits, and starting to fill
them out nicely. There's no one else around, so its kinda quiet, and I can just
about make out what they're saying.

"I bet I can take more than you, I'm older and more mature"

"Oh please, you're only two months older than me, we're basically the same
age. And besides, I've been practicing, so I know I can take more than you"

"Well, there's only one way to settle this..."

That's when I see them start to look around, they both spot me at the same
time. I watch them walk up to me, not knowing what to think, I guess they
think I can settle their dispute.

"So Amy, what do you think?"

"Yeah, he'll do"

Do for what I wonder.

"Hey mister, would you mind settling our argument for us?"

"Sure, I guess, what can I do for the two of you?"

"My friend Amy says she can take more cock inside her than I can, but I
think I can beat her, so what do you say?"

"What do I say to what?"

"Can we use your cock to settle our bet?"

"Sure, I'd love to help you two out"

"Great, let's go back to my place, my mom won't be home until late"

I watch them walk away, I let them get a good pace ahead of me so that it
doesn't look like I'm following them, in case anyone is watching. They both
go inside, and I follow a minute behind. As I go in, Amy is closing the curtains
so no one can see inside.

"So do either of you have boyfriends?"

"No, we're both virgins, but we've seen a lot of porn on the internet, and we've
played with ourselves, but we've never had a real cock inside either of us."

I follow Amy's friend to her room, it's the classic teenage girl's room with stuffed
animals on the bed and music posters on the walls. She clears the bed of her
stuffed animals, and tells me to lie down. All I have on is my bathing suit, and I'm already half hard.

"OK, who goes first?"

"Let's do rock/paper/scissors"

Amy puts our rock, her friend, scissors, so she gets to go first. She peels off
her bikini. I can't believe what's about to happen. They both pull down my
bathing suit, at this point, I'm rock hard. They both stare at it for a while,
then hold it in their hands to get a feel for it. Finally, Amy straddles me, holds
my cock straight up, and starts to lower herself down on it. Naturally, she's not
worked up enough, and since it's her first time it's all she can do to get just the
head inside. It feels so good I just want to grab her by the hips and push her
down on me, but before I could even move, her friend takes off her bikini and
pulls her off of me.

"OK, my turn, you had your chance..."

That's when her friend assumes the same position, but she teases her pussy
with my cock, getting herself wet first before taking the plunge.

I can see her
face get all strained as she prepares to impale herself on a real cock for the first
time. Determined to take more in than her friend, she pushes down on me hard,
and she gets about an inch past the head inside her.

"OOOOH that feels good..."

She starts to ride it, moving that inch that's inside her back and forth, working
herself up to take more and more inside her on each stroke.

"Oh no you don't, my turn"

That's when Amy takes charge, pulls her friend off of me, and once again
settles down on my cock, this time, with more force the way she saw her
friend do it. This time she's able to take about half of my cock inside her.
Man she's tight, it's all I can do to keep from coming.

"There, you see, unghhh, I told you I can take more than you can"

She starts riding my cock hard, so that about 3/4 of my rod is inside her.
Her face is all flushed, even her tits are blushing, I can't believe this is
happening to me.

"It's not over yet...I want another turn."

Her friend pulls Amy off of me, and settles down on me, this time determined
to  bottom out on my cock, which is just fine by me. I can feel my cock go
deeper and deeper inside this 16 yr old, and with a last push down, she does it,
she gets all my cock inside her.

"Ahhh, oh fuck, there, you see, I did it, hey mister, are you ok? we're not hurting
you are we?"

Oh you gotta love the innocence of a 16 yr old.

"No, it's just that, well, if you keep this up, I'm gonna, well, you know..."

"Hey, that's right, he can only come inside one of us, so who's gonna be the
lucky girl?"

"Let's do rock/paper/scissors again" says Amy

So as her friend is riding me, she turns to Amy to play rock/paper/scissors.
Once again Amy plays rock, to her friend's scissors (Amy knows her friend
always plays scissors) but her friend tries to ride me ro make me come anyway.

"Oh no you don't, I won so I get the good feeling, I get to feel a real man come
inside me!"

She settles down on me as far as she can, and starts squeezing and gyrating
on me. That's all I could take, I hold her by the hips, close my eyes, and release
my come inside her.

"OOOH, I can feel it, oh my god it feels so good, don't stop, keep coming,
come in me all the way!"

She stays on top of me for a good three minutes after I come, then she slowly
climbs off me, my cum dripping out of her pussy as she does.

"OK, thanks mister, that was fun, but you better go, I need to clean up and stuff"

As I pull my trunks up and leave, I realize I never did learn the other girl's
name, but I'll definitely keep an eye out for the two of them if they ever need
someone to settle another argument with.