I kind of want to try this with someone from a gender I'm not sexually attracted to who is also not sexually attracted to my gender. I'm assuming we'd just end up closer friends.
But much of this thread is assuming "in love" (in the sense this practice purportedly produces) is a state that is inherently linked to sexuality. I'm not sure whether or not that's the case.
Ancient Greek had four words for love, only one of which meant the love a man has for his wife. There was also the love of family, the love of friendship, and the love of spirit. CS Lewis gives a great lecture on the Greek ideals of love, here, https://medium.com/message/radically-renovate-your-relations...
It might motivate the assumption, but it doesn't have to be the case. One can imagine a model where there is some fact about a person that determines who they can fall in love with, and that hetero-, homo-, and bisexuality fall out of that for people with interest in sex, but which is still present but possibly less observable for asexual people. I have no particular confidence that this matches reality well at all, but it should be enough to show that there's no logical implication...
