David Gerrold, the author the book, adopted a son as an openly-gay man. In his novella, the sexuality of the protagonist is not disclosed, but in his novel, he is identified as gay. In the Hollywood movie version, the protagonist is straight (with a female love interest), causing some criticism from some members of the gay community nationwide.
Author David Gerrold publicly distanced himself from this adaptation of his novel after his screenplay was rejected by the studio. He publicly rejected the final film for deviating too far from the source novel, especially in regard to making the main character a straight man with a girlfriend instead of a bachelor with no love interest.