I think the questionaire for donating blood still has the question about whether you have ever spent one night in jail. Apparently, this correlates highly with having had sex with a man (another of the questions). This is not something you want to do with your teenager. Jails are dangerous places filled with dangerous people. (They tend not to suffer 17 year-olds with attitudes.)
Man, that's rough. I know they meant well for him, but the lesson was permanent and deadly. They'll never get over this mistake.
btw, i made note of your sig line. I'll remember, thank you.