Yep. THAT was another "out" that was available. As soon as I started reading this post I thought to myself, "wait a minute...there was at least one another way."
After a year in Vietnam, I was assigned to Hickam AFB, HI. I did a lot of traveling in my job, and became pretty good friends with a woman who ran the passenger terminal. She had many stories to tell, but one that sticks in my memory was about two GI’s on a contract flight transiting Hickam who were removed after they were caught, one performing oral sex on the other. Apparently this happened more often than one would expect because these guys—draftees—didn’t want to go to Vietnam.