This was a road sign supported by two pillars straddling the pavement just outside the school entrance. Any person who inadvertently walked between the pillars was destined to lifelong homosexuality unless they could retrace their steps within three seconds. If walking this stretch of pavement with a friend, one would attempt to engage them in protracted and intense conversation for the time it took for them to both walk through the lifestyle changing portal and for the effects to become irreversible. One could then loudly draw the unsuspecting fellow's attention to his new love of musical theatre.

At the end of the science block in Singleton High School, there's a small underpass. When I was in year 11 or so, we overheard some year 7 kids declare that it was the Poofter Hole, after one of their friends inadvertently walked through it.
I mentioned this to my wife many years later who, coincidentally, went to the same school as me. She was surprised to hear it called the Poofter Hole and wasted no time in pointing out my obvious blunder; everybody knows damn well that it was Lezzo Lane.