My sister Kate, about two years my junior, was always interested in plants and flowers, but also bugs and other little critters. It was therefore no surprise that our parents got her a microscope for her last birthday. It was a well-received present, and she studied plant leaves, bread mold, and drops of water from the creek behind the house. You name it, she had put it under her microscope. It was no wonder that biology was one of her favorite subjects in school.
I had just gotten back from college for summer break, and Kate's vacation had not yet started, but her college is nearby, so she still lives with our parents. Our parents were away on holiday by themselves for a week, and Kate and I had the house to ourselves. This was fine with us; the pantry was well stocked, and they had also given us some money for food. We were not going to starve. I spent my free time reading, sunbathing in the garden, and cooking for the both of us.
"What are we having for dinner tonight?" Kate asked during breakfast.
"Not sure yet, why?"
"Well, Julie and Tanya are coming over to study; do you want to cook for them too, or should we order something?"
"Sure, I'll toss something together; summer salad sounds good?" I asked.
"Oh, nice! I'm sure they'll love it!" Kate said as she swung her backpack on her back and left for college.
I had met Julie and Tanya before. Tanya was a pretty, petite redhead with a naughty streak. Last summer, during a camping trip with Kate and me, she convinced us to go skinny-dipping with her, and she also managed to get herself a tattoo even though she was still underage at the time. Julie was more modest and less outgoing, but definitely not less attractive. She was taller than Tanya and had large breasts. Although Julie did not dress provocatively, she usually wore tight shirts or dresses that accentuated her chest.
The rest of my day was rather uneventful. I prepared dinner, put it in the fridge, and went out in the garden to catch some rays. I tried to read, but after half a page, unable to remember the last page that I had read, I put down the book and closed my eyes. It took only a minute or so to doze off.
About an hour later, I woke up to a noise from the house. Kate and her friends had come home. "Hi there, sun worshiper!" Kate exclaimed. As the three of them came into the garden. I stood up and greeted them. They went back inside and went to Kate's room to study until dinner time.
After dinner, we chatted over coffee. After a short silence, Tanya announced: "Julie has a question for you!". I looked over to Julie and saw that her face was turning a bit red.
"Well, we were studying all kinds of stuff under the microscope, and we wanted to...", she stammered. "Eh, study something new, you know..."
"Come on, just say it!" Tanya interjected.
"Well, we wanted to study sperm cells." Julie finished, her face now red as a beet.
"Sperm cells? And how do you want to get those?" I replied, although I was sure I knew the answer.
"From you, silly! You're the only one here that can provide them!" Tanya said she was clearly not patient enough to let Julie answer.
"No way! I mean, do you expect me to ejaculate into a test tube for you? No!" I objected, although I must admit, the thought did excite me.
