I had first seen Co when he was born in a local zoo where I lived in Cheshire. He was such a cute little thing that the very act of seeing him born inspired me to go on and study to become a zoologist. Over the years I still visited Co Co even when he was moved to participate in a unique chimp experiment. He was to be treated more like a human than chimp. Although this didn’t preclude the interactions with other chimps but he was primarily to live and be treated as a human.

Over the years I kept in touch and visited him on a regular basis usually at least once a month. After having completed my doctorate on human ape interactions, specializing in human chimp relations, I finally landed the job I really wanted to study and befriend Co Co more closely. Over the years he had become more attached to humans than chimps. He even lived like a human and slept in a bed. He was more than toilet and house trained. He even had his own specially designed toilet and bathroom. The toilet was more like a hole in the floor with a special automatic flush but he soon got used to it .Indeed He was a very clean chimp for he was trained to and did indeed wash and thoroughly cleanse himself after the event.

For the purpose of the experiment Co Co needed a long term partner. Yes, you’ve guessed it, I was being groomed to be his long term mate. I was only still in my mid twenties with a string of failed affairs behind me. I had realized that I preferred the company of primates and my special primate Co Co. I had undergone numerous physical and psychological profiling and testing prior to the experiment pursuing its course. I had been working at the facility, as it was called, for over three months when I was called in to see the director.

“Pleas sit down Kathy, You know why you are here. If you are in full agreement you may continue. First are you willing to become the girlfriend of Co Co. If so then your courtship with him will become even closer. Of course you are booth sexual beings both with needs and desires. I see from all the tests done you are stable and psychologically sound. Co Co understands the concept of relationships and even understands the concept of partnerships and marriage. As you and him enjoy each other’s company I will sanction for you to continue meeting and dating him and becoming his official girlfriend. Of course you will still have your duties and work to continue here.” I immediately agreed to his conditions and even signed a written contract to that effect. I understood that we would take things gently at first to see how things developed .There was even the possibility of us cohabiting together of things worked out well.

The next few weeks flew by. I moved into a new flat on the facility so I could be nearer Co Co. We even went to dinner together at the restaurant on site. They knew all about him of course. We would go together or sometimes with other couples, human ones, of course. The whole of the staff was in on the “experiment as well”. Our relationship of course had its ups and down- but mostly ups. Co Co himself was a magnificent beast standing almost five foot five tall and weighing in at almost 70 kilos. I suppose the most notable feature about him is the size of his scrotum which holds his exceptionally large testes. Like all chimpanzee his were much larger than any human male. Also his penis, contrary to opinion wasn’t all that small. Indeed I was told he measured a full six inch- when erect. As always I am getting a little ahead of myself. I will tell you a little bit about me. I am Kathy and as stated I am in my mid twenties. I am five feet five tall. I have a 36, 23, 36 figure I wear a d sized bra .I have short dark brown hair. I have also been told I have wide child bearing hips. Not sure if that’s true but they are wide. I was of course single. Both my parents are living .My father is a vet. My mother is a doctor. I suppose you could say it was my parents, my father in particular who has encouraged me in my interest in primates. I have also got an older sister, Suzie, who is married with two young children.

It was a pleasure seeing Co Co growing up. He always had a friendly “smile” for me when we met. He became increasingly playful and affectionate and would often kiss me on my lips. His breath wasn’t that bad because he had been taught how to clean his teeth.

When I started work at the facility my job was to observe the animals and note their behaviour. Of course I paid special attention to my special ape. After the first few weeks he began to take an interest in my body, particularly my breasts and pubic area. Up until it was decided I could begin dating him I spent at least an hour a day with him.

I left John’s office with a spring in my step that fateful day. I was happy for the first time in years. I could now spend more time with my boy. The time just flew by with Co Co and I spending most evenings and weekends together. At first it was just platonic but the time was fast approaching when our relationship would go beyond that. It happened one wet and windy night in October. Although it was only a shirt walk to my flat Co Co indicated he wanted me to stay the night through sign language. Yes he had quite a vocabulary even then. Of course he knows much more now. We had been sitting together watching a film in which a couple were making love. Co Co was very amorous and he undid my blouse and unbuckled my bra whilst we were kissing passionately. We often had done this for w few weeks .However tonight was different. For one thing I was becoming increasingly frustrated and only a male could satisfy that. I was becoming extremely moist and aroused. Also Co Co penis was standing out . He began to undo my trousers and gently rub my clitty through my panties. We began to make love and mate there and then . Before I knew it he had my trousers and panties off and we were both naked for the first time together.