I really don't think it's that deep. Ig you could argue that watching him grow was weird but he never tried to influence the dude and there's no weird power dynamic. Ie like the older using the fact he's older to gaslight the guy into thinking he was lesser or naive or really anything of that sort. Like if the younger dude ended up a bottom I could even argue a power balance issue but that didn't happen either. Plus nothing we were shown even suggests that anything happened till they were older.
But it's your personal choice not to read it and I'm not gonna beg you to either lol. I just really don't think the age gap is a big deal. Plus you could groom/gaslight someone regardless of age if they're a shitty enough person.
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Saw the ages and ran. It’s giving grooming.