my sperm donner

when people here me say something like " i have to call my sperm donnor". they freak out not know what it is im talking about. my so called real father left my mom when i was little. he was not in my life, he was not there when i won my first game, or my first day of school, or anytime i ended up in the hosiptal. i dont really think he can be called my dad. my so called step dad has been there for me all my life. since the day i was 18 months old, he was there. hes held me when i cryed, he helped me beat up my 3 older brothers, and i know he loves me and cares for me. to me the title "dad" has to be earned. not givin. so for my reason i call him my sperm donner cuz to me he is nothin more then that.