Where Did I Come From?

Roderick often spent time wondering about his father...most often he wondered what he would have looked like.  He knew he had inherited his excess hair from his mother, Roberta, The Bearded Lady, but what had his father passed onto him?
Roderick had often asked his mother to tell him about his father - What did he look like?, What did he do for a living? and Why weren't they still together?  But Roberta found it a topic too difficult to discuss. 
One night she was dreaming and talking in her sleep.  Roderick went to check on his mother and heard her calling the name Roger.  She also said a few rude words followed by the name Roxanne.  He quizzed her about it the next morning but she denied everything.   Unfortunately her denials were not enough to stop his curiosity.....