Niobe Way comes to similar conclusions in Deep Secrets: Boys’ Friendships and the Crisis of Connection but I’m not sure I’d pin it on a shift in religion but the hyper-sexualization of society that started in the 60’s where every intimate relationship was primarily defined in the context of sex. Today much of the language and expressions of intimate relationships has been entirely co-opted and has sexual overtones compared to the 1800’s. Expressions such as holding hands and words such as love and intimate all now have sexual overtones they previously did not.
https://news.harvard.edu/gazette/story/2011/04/the-secret-li...
https://dustyoldthing.com/19th-century-concept-of-friendship...