I only have one theory about that. The women for some primal reason think that these trysts will somehow make them feel young again. Trying to reclaim things they missed when they were younger.
Or they have a problem dealing with grown men.
I think it’s much more primal.They just want sexual stimulation..They will fantasize that having sex with a prebuscent boy...is adequate. Those types of women are very ill mentally.
If the kid is old enough to father a child, then the women is just very inappropriate, and socially crippled as you mentioned. She probably has other social and emotional deficits.
I think some women see their job as helping boys become men.