The solution to this is something people just do not want to do.
That is, to have extended and extensive, chaperoned, social engagements for boys and girls, in which the emphasis is on interaction, not something else that distracts them, as what happens in school or church.
I’ve even seen the suggestion that they might be bound together at the wrist or the ankle with padded nylon tie downs.
If they actually learn to function with the other gender in non-sexual ways, the understanding dispels a lot of the ignorance, and they are far less to dehumanize the other gender.
In the colonial days they practiced a co-ed sleep over called “bundling” where a boy and a girl spent the night together in the same bed just to get used to each other. Not what it sounds like. Heck in those days even kids drank alcohol.