They created Steve with the Intent of showcasing that a Strong Independent Woman can love a week man, and that a man who feels he is superior has to lower himself to know the woman he loves could break him In half, based on cannon Trevor was the first and only man Diana has ever seen, but she has beard of them, she didn't even know about hades being imprisoned on Themiscara, yes Steve was her first love but that never took away from her presence, or arch type.

Yes she was a Virgin when she met him yes he got it friat, but she is strong and he succumb to the fact that he can never conquer her she is the 1, Futurama Explains it best Death by Snu Snu!!!