Cock-a-doodle-do!

I’m one of two research assistants on a biology experiment measuring female choice in wild jungle fowl. We’re testing if hens pick roosters that are resistant to disease and are therefore able to develop more colorful feathers and bigger combs. One of us sits in a booth with a one-way mirror, a stopwatch and a clipboard. The other releases a hen that chooses between two tethered roosters. Both roosters can see the hen but not each other, and they strut around like crazy, frantic to get laid. The person in the booth records which rooster the hen picks, if they fuck, and how long it takes.
She’s in the booth, recording, and I am outside tethering roosters. I start imitating the horny roosters, strutting and crowing and looking desperately at the window. She’s laughing. I would love to fuck my co-worker and I think she knows it. She’s a smart science geek with a farm girl look, dark braids, a straw hat, and cut-off denim shorts.
We switch. I’m in the booth, recording, and she’s tethering the next set of roosters. She bends way over to give me a good look at her ass. I’d like to say she’s subtle about it, but she’s not. I start crowing and scratching like a rooster trapped inside the booth. I wait for her to release the hen, but instead I hear the booth door open behind me. “Shut your eyes and stand up!” I comply. She whispers in my ear “Guess who this hen picked?” I feel her unbuttoning my pants and they drop around my ankles. She pushes me back on the bench and says “Now open them!” She’s wearing nothing but the straw hat. She straddles me, guides me into her and clicks the stopwatch. “I wanna see how long you can last.” I’m thinking “not very long”; she’s wet, it’s a tight fit, and I'm so shocked I feel like I'll blow my load. She loosens up a bit. We switch; I go down on her to make her come and give me a chance to cool down. Then she leans over the bench and we go at it hard, doggy style. We make more noise than a whole barnyard of animals. The roosters outside are absolutely silent.