For us this might have been because we knew our parents had both both been virgins when they got married at 20 for mom and 24 for dad. Even though they were children of the 70’s that was just the way it had worked out for them and I guess it still looked good to us.
It would be a while before we found out just how much of that 70’s open attitude about sex they had been immersed in was still part of their seemingly conservative makeup but more about that later.
Our 18th birthday party was really special. Our older brothers and their families filled the house with people and kids for a grand cookout that ran well into the evening before they all headed home.
Mom and dad slept in the next morning while sis and I tended to morning chores. Usually this was feeding the livestock and gathering eggs after turning the chickens out of their coop.
We’d always had a variety of smaller animals about the place but in the last month dad had added a couple of plow horses he was planning to use on few adjoining acres he’d also just purchased. The pair of them, Bob and Sue were in their corral at the moment and we’d turn them out later.
As we headed back to the house with eggs for breakfast we both grabbed a big handful of long, fresh, green grass to give them as we passed by. It had become a thing for them to come over for grass and petting.
We set the eggs down and stepped up to stand on the bottom rails the better to hold out the grass.
Something was different this morning though. They both completely ignored us. Sue was just standing there a bit stiffly with her tail arched. Bob was dancing about a bit and sniffing at her tail.
“That’s odd,” said sis.
“Yeah,” I agreed.
If we had had Bob’s sense of smell we’d have known what was literally in the air. You’d think a couple of farm kids would have been quicker on the uptake. In our defense we’d seen plenty of chickens, goats, dogs and so on going at it but they were all much smaller animals. We’d never even had cows.
All of a sudden as Bob reared up on his hind legs his shaft which had been hanging loose suddenly stiffened into two feet of pure maleness about three inches across at the business end. Taking a half step forward he lowered his front legs over Sue’s shoulders and just rammed the whole thing straight into Sue’s waiting cleft!
We were simply transfixed! Pure, erotic poetry in motion on a huge scale. The big muscles in Bob’s haunches contracted into stark relief at the end of every nearly foot long stroke as he pumped her. After half a dozen he held himself still as deep into her as he could go while those haunch muscles kept flexing strongly.
Then almost as quickly as it takes to tell it Sue stepped forward. Fluid streamed from her opening as Bob’s now limp shaft slid out and the deed was done. Just like that. Wow!
What I had just seen was burned like a photograph in my mind’s eye. As it turned out sis was affected the same way.
I turned to look at sis as she turned to look at me. Her eyes had to be as big around as mine were. It took a few seconds of just staring at one another for me to realize I had a massive erection building. I don’t know what sis felt but it must have been similar because we both began blushing together.