There is no apparent "normal" - just look at how long some victims of pedo-priests kept quiet. Look at how long some of Sandusky's victims remained silent (and probably would still be silent).
Just admitting that one had been involved in what the rest of society considers to be an abnormal relationship can be traumatizing - thus people tend to avoid doing so. A large percentage of those who do bring it out in the open do so only after some other psychological "crisis" that weakens the dams erected to keep all that inside. I am very interested in learning what was behind both of these "outings". It's not something that just comes up around the dinner table or even while having a few beers with the guys - "Oh, by the way, I was in a sexual relationship with an older man when I was x-teen and living in __." It's more likely to be an explosive response to an emotional hurt that is often not even related to the perpetrator (break-up with current significant other, family finally figures out you are gay, etc.)
How do you arrive at "keeping just this side of legal"? Both were between 15 and 16 at the time of the alleged incidents.
stay safe.