Here's how the original 1910 boy scout handbook defines morally straight.
"In its briefs below and to this Court, Boy Scouts claims that the language "morally straight" and "clean" in the Oath and Law, respectively, constitutes a rejection of homosexuality. The Boy Scout Handbook defines "morally straight" as follows:
To be a person of strong character, guide your life with honesty, purity, and justice. Respect and defend the rights of all people. Your relationships with others should be honest and open. Be clean in your speech and actions, and faithful in your religious beliefs. The values you follow as a Scout will help you become virtuous and self-reliant.
The Boy Scout Handbook also defines "clean":
A Scout is CLEAN. A Scout keeps his body and mind fit and clean. He chooses the company of those who live by these same ideals. He helps keep his home and community clean.
You never need to be ashamed of dirt that will wash off....
There's another kind of dirt that won't come off by washing. It is the kind that shows up in foul language and harmful thoughts.
Swear words, profanity, and dirty stories are weapons that ridicule other people and hurt their feelings. The same is true of racial slurs and jokes making fun of ethnic groups or people with physical or mental limitations. A Scout knows there is no kindness or honor in such mean-spirited behavior. He avoids it in his own words and deeds. He defends those who are the targets of insults."
Dale v. Boy Scouts of America
You'll see no mention of sex or sexual orientation and nothing that applies to all gays.
