How to help a 12-yr old male with his questions?

I am a good friend to my neighbor's boys. It is obvious to me that the 12 yr old is gay, and he is starting to ask questions about it...like: do men wear nail polish? I am totally 100% cool with ity..my big bro is gay, and I knew by the time I was 5 yrs old...no joke! So, of course, I do things like say I believe that being gay is totally normal. But are there other things I can do to help him? His dad doesn't even want the boys to see pics of naked persons in the movies and such until they are 18...so telling him to talk to his dad is awkward at best. Of course, everything I talk with the boys about is appropraite and clean...I am the mom of 2 straight young adults...and a retired peds R.N....so don't worry on that account. I teach stranger danger and "no one touches you without your permision" to all the kids. But when my bro and I were growing up, no one talked about uality at all. So I would like some help here...guys- what else could I do to help this sensitive, intellligent, sweet-as-can-be kid? By the way, his dad is fighting bad throat cancer so that is why I have the boys around. And his brother is autistic and very bigged-mouthed so this is a boy who has a heavy load already. What safe things can I tell him to guide him? What obstacles may he face? Any good, safe, clean simple books for young teens who think they may be gay? Any sensitive movies (the movie "Out Cold" is one...for all boys ages 12-14 or so...about snowboarders...very great scene when one is accepted as gay with the love of all of his chums). Please don't suggest anything on the internet for him....only for me (to read). Anything I give him, like a book, with be with the approval of his mom, by the way. And, again, I stress, anything I say to kids is clean and appropriate. Kids rule, and I would never do anything to hurt them. Thoughts, anyone?