Papa bear,all you need to do is keep doing your thing.
In my non-legal days,when I was only rolling around with guys my own age,it was always protected.This is because from a young age,us gays get the shit scared out of us with all the STD stories we hear.Then,when I was seventeen,I got my first chance to live out a dream I had been having since I realized I preferred dick:I got to sleep with an older man.I met him at work,we flirted for a few days,and one day he invited me over to his place and made clear his intentions.Sex,possibly more than a one time thing,but no romantic strings attached.We get to his apartment and,slowly but expectedly,things heated up,and by the time we get to the bedroom we were already half naked and eagerly working on the other half.He pulled my pants off and was about to throw them aside when I stopped him,I pulled out my wallet and retreved the rubbers that,back then,I never left home without.When he sees this,the mood seems to change.He tells me he doesn't use condoms,hates how they make his dick feel trapped and hates how much of the feeling it takes away from the fucking.This of course was a problem for me,because I had heard about all the nasty STD's,and didn't want to catch any of them.So I had to choose:Insist on protected sex and potentially end the experience,or say 'fuck it' to the condom and live out my fantasy of being bedded by a sexy older man.Like any hormonal seventeen year old,I chose the path that would most likely lead to me getting laid.I did in fact get laid that night,several times actually,and it was all raw,cum swapping bareback sex.And it was amazing.
But,as amazing as it was,I initially considered it a one night thing for me and I did go back to protected sex for a couple more years,only barebacking when I REALLY needed it and I knew the other guy was clean.Then I got more and more into bareback porn,discovered people and sites like rawTOP,got more into the lifestyle,and for almost two years now (I'm 21 now) I've been exclusively bareback.
So essentially,at least as far as my case went,the thing that converted me was having bareback sex at a young age.Now,I am in no way encouraging anyone to go out and sleep with anyone who it's illegal to sleep with,but if you can get to the next generation as early as legally possible and show them one or several mind blowing,condom-free experiences,then they'll come along eventually.And if they're anything like me,it won't be that long of a wait.
Hope this helps with your question.