"Bill....why is it "difficult to educate" young male homosexuals, as opposed to young male heterosexuals?"


Because they ARE young and overconfident and don't follow 'news'. They use social media for.... being 'social'... but don't commonly read sites with clear advice, possibly because they'd be told to alter their behavior! It is pretty well documented that young people 'feel invulnerable' and take chances in many activities... even those not involving sex.

It is also the case that in a number of US states, all education involving sex is still considered embarrassing and is often not taught... or not well taught... in schools. Kids, straight and gay, trade bad information among themselves in ways they have for hundreds of years. Parents can make a difference, but often don't know how to counter the 'youth culture'.
Progress is being made, but it still leaves the young ones at greater risk.