William was a young man but his time was running out. In his mid twenties, he didn't have a lot of time to accomplish his mission. His parents and siblings had all died when he was young and subsequent research into his family tree showed that his family was nearly extinct. In fact, he was the last male of his family. He was determined not to be the last of his line.
He would marry and have children of course, but how many children could his wife agree to have, at most? Only a few. When his bloodline was so close to being ended, that wasn't good enough. In a way he was fortunate. Handsome and highly intelligent, he graduated early from college with a masters degree in biology. Testing himself, he found himself to be a highly fertile male with a high concentration of healthy sperm. Still his 30's were approaching and his fertility would decline. The time was now.
To prevent the possibility that his spawn could be wiped out in a natural or man made disaster, he traveled the world to keep his seed from being wiped out if they were clustered too closely together. His first stop was Japan, where the women liked Western men and contraceptive usage was low.
At a Tokyo bar, William met Hitomi, a voluptuous 19 year old woman with beautiful eyes and an excellent waist to hip ratio. He judged her to be ovulating, or close to it, judging by her high voice, low cut top and high skirt and flirtatious manner. Being attracted to him and taught to be submissive from an early age, Hitomi happily went to a hotel with him. William was amazed that he simply told her that he didn't want to use a condom and she quietly consented.
Knowing that stress was the enemy of conception, William took his time caressing Hitomi's firm feminine body. He stripped her of her tight clothes, amazed at the huge breasts that strained against her bra. Her nipples were erect with excitement, a sign which pleased him. Upon taking off her brasserie, her breasts fell heavily to her chest, her small nipples firm and at attention.
He lay her on her back and spread her legs wide. Kissing her down from her lips to her genitals, he slowly pulled her pink silk panties from her moist vagina. Its lips were already open, waiting for his seed. He stripped in front of her, letting her see his swollen manhood. A smile crept across her face, obviously thinking of what this exotic cock would feel like in her snatch.
Climbing on top of Hitomi, his uncovered dick touching the entrance of her vagina, he was surprised when she let out a small gasp and winced in pain. Her hand touched her abdomen low on her left side, not far from her uterus would be. Smiling to himself, William recognized the possibility that Hitomi had just experienced Mittelschmerz, a pain associated with ovulation.
"Perfect timing," he said to himself as he inserted his dick into her pussy. He slowly pumped her, letting the pleasure hormones slowly overtake her mind and made her forget the sharp pain in her abdomen. Soon Hitomi was softly squealing in pleasure, pleased to have met a charming Western man who treated her with more respect than her Japanese suitors did.
As William sped up his thrusting, he noticed the sex flush spreading across his exotic baby carrier's body. He increased the rate of his fucking, knowing that it was only a matter of time before he burst his seed into this fertile young woman's body and the first of his seed would being to grow. Wanting to take no chances, William fucked her as hard as his body could move, wanting to give her every drop of his semen to maximize the odds of fertilization.