I guess it doesn’t help you to say it now, but this was a terrible way to deal with a slight nuisance from what has to be a small group of stupid people. This has the potential to cause far greater intrusion and judgement from your coworkers than your lack of marriage and kids ever would have done, and this especially with a crowd that love gossip. You’ve potentially handed them the juiciest gossip they’ll likely ever get and given how dull the workplace can be, they’ll be milking it for years if they find out.
I think you’re pretty much in it for the long haul now, which will take work to maintain, and also depending on how long you work at this place with these guys, you better hope your unusually youthful appearance stays at a consistent 18 years behind your real age and doesn’t hit a sudden inflection point where it suddenly all catches up because that’ll be tough to account for.