I'm thinking of working on a story about a guy who doesn't believe he'll ever be lucky enough to ever get a girlfriend or even sleep with one and get her pregnant. He thinks things over for a long time and decides to donate to a sperm bank. Even if he has no contact with the child he just wants to have a child out there. Unknown to him a friend of his works at the sperm bank and uses the sperm for herself or a friend if the one who works at the sperm bank is male maybe he contacts a friend or even his sister or the donor's sister. I don't know much about the dealings with a sperm bank so would anyone be able to help with those details?