The thing about Sammary I feel is that once you actually see it, you kinda realise it’s everywhere. It literally starts with them, a mother trying to protect her baby and being killed for it except through the show, it unravels to reveal how deep their connection goes. Mary attempts at escape from her abusive home life ensuring Sam growing up the same way she was. The way they never actually know each other yet are constantly haunted by one another through their shared trauma and mutual guilt (Sam’s birth being Mary’s death). The thing that wore her father’s face whilst he coerced into a kiss being mistaken for Sam’s father whilst it feeds Sam’s its fluid. Demon blood being described as ‘better than mother’s milk’, milk being needed for a baby’s development, Sam’s own shame and self-hatred regarding a body narratively as assigned monstrous and grotesque through being sustained on demon blood and guilt about Mary’s death. His initial suppression then attempts to find autonomy through this violation leading to drinking Ruby’s blood (better than mother’s milk). The way that arc culminates on pinning a golden haired woman in a white dress (who previously aimed sexual advances at him) to a wall and killing her. The parallels between Mary, Lilith and Jessica.