You seem to be putting being attracted to minors on the same page as being gay, which is simply staggering. No wonder people are still scared of revealing their sexuality when comments like that are made.
I would say frankly : That is your problem to deal with.
As for the suggestion he uses separate changing areas - why not give him his own cup to drink out of as well. You could even make it a pink one so its easily identified - that way the other players wouldn't have to drink out of it. Jesus Christ.
Here we are in 2022, still knee deep in absolute dinosaurs. I thought they died millions of years ago - apparently not.