It's slightly deeper than that but it's on the right track.
Modern American men are completely starved for affection of any kind. This is why so many guys feel like being complemented is a sign of romantic interest.
The only real affection they've ever known was from their mothers when they were children. This conflation of romance with affection and association of affection with their mother end ups being transitive, associating mothers and motherhood with romance and sex.
It's not that they want to fuck their mother ala Freud, it's that they want to fuck someone that shows them affection and the only person that has ever showed them affection is their mother