There are a lot of fanfics in the subgenre of Harry Potter fic that prefer to set up Harry with anyone but Ginny (and sometimes also Hermione with anyone but Ron) who propose that Molly Weasley furnished her youngest two with love potions, due to both Harry and Hermione's sudden 'irrational' (aka hormonal) behavior in book 6. Some are kind of fun; some are even mildly persuasive; but most are bashfics extraordinaire. I went looking for the origin of this theory, and here's the reddit link I was pointed to, from about four years ago:

https://www.reddit.com/r/harrypotter/comments/1bo79d/the_crazy_theory_that_ginny_weasley_dosed_harry/