(THE CONVERSATION) An award-winning, veteran Bronx high school teacher, handed in his resignation after colliding with the school’s principal in 2016. Tom Porton had distributed HIV/AIDS education fliers listing nonsexual ways of “Making Love Without Doin’ It” (including advice to “read a book together”).

What does it say when a teacher who encourages students to discuss nonsexual ways to express love causes controversy? And how do discussions at school about sex affect teenagers? Do adults lose teenagers’ trust when they are not allowed to speak frankly about how to create healthy intimacy?

M...