In all seriousness it's kind of heartwarming that we're at the point where elderly gay men can now, too, marry creepily below the acceptable age range.
That was my reaction too. I think true LGBT equality is admitting that there's something kind of off about marrying someone who could be your grandchild, regardless of whether they are of the same or the opposite sex.
I'd argue that it i'ts a lot more concerning in heterosexual couples due to the inherent power imbalance between genders, but I know this kind of argument won't go over well here.
Yes, I think the historical prevalence of pederasty weakens this argument considerably.