Film by Sid Davis, a social guidance film director and producer.
"Boys beware" is from 1961 and apparently quite notorious from it's heavy anti-homosexual tendencies (pretty much labeling that being homosexuals = pedophiles).
As important as the message to be cautious is, the bigorty of film maker makes this quite laughable. Attitudes, society and culture have luckily changed so much that we can laugh at the untintentional comicalness created by the passionate tone of this film.

And no-one thinks like that anymore, right? (sadly that's not true...)

"What Jimmy didn't know was that Ralph was sick. The sickness was not visible like small pox, but no less dangerous and contagious - the sickness of the mind. You see, Ralph was a homosexual, a person who demands an intimate relationship with members of their own sex."

Boys Beware by Sid Davis (1961) - lenght: 10:19