If the gay boy becomes attracted to the straight boy, a quick punch in the nuts from the straight boy will put an end to that right quick!
... if the straight boy has enough gumption to do it, sure. And he should!
Sadly, that's not always the case, especially if the straight boy is younger, smaller, or susceptible to bullying and coercion.
This is naive.
I still think this is relevant, but when I was a kid and we knew another boy was gay, yeah they were pretty much bullied nonstop.
Gays can be bullies just as much as straights. I'm not naive, I speak from experience which is much longer than yours. 
I've never met a single gay bully in my life. Are they the new boogeymen?
Funny...I have met a lot.
Of course you have...

In the real world, however, statistics gathered show that homosexuals are far more often the victims of bullying rather than the perpetrators:
Among the findings of the 2009 Canadian Climate Survey on Homophobia:
59 per cent of LGBTQ high school students reported they were verbally harassed, compared to seven per cent of non-LGBTQ students.
25 per cent of LGBTQ students indicated being physically harassed due to their sexual orientation, compared to eight per cent of non-LGBTQ students.
31 per cent of LGBTQ students reported personal harassment on the internet or via text messaging, compared to eight per cent of non-LGBTQ students.
73 per cent of LGBTQ students reported they felt unsafe at school, compared to 20 per cent who did not.
51 per cent of LGBTQ students reported they did not feel accepted at school, compared to 19 per cent of non-LGBTQ students
A 2009 survey of U.S. students in Grades 6-12 also suggests being bullied at school is more likely for sexual minorities. Some key findings:
85 per cent of LGBTQ students reported being verbally harassed at school in the past year because of their sexual orientation.
40 per cent reported being physically harassed.
19 per cent reported being physically assaulted
http://www.cbc.ca/news/canada/story/2010/10/29/gay-bullying-statistics.html