One shouldn’t just stick his penis through a glory hole and hope for the best. He might try looking through it first. If the person on the other side is hard and stroking, he should then poke a finger through. If a finger from the other side returns the gesture, it’s time to play ball. Or he might stroke his own penis as a sign of availability until a guy on the other side bites. All is nonverbal. There is no room for small talk in glory hole cruising.