Ah, I have to think hard about this. I've never heard this phrase before, so I'll answer it as I see it. Maybe someone U trust is just afraid of U taking a risk. Maybe they R just worried about what might happen. But I think it's better for them to let U ride a bike, with their help of course. They can hold U while U learn to ride, help U find ur balance, be ur guide and support, until U can ride on ur own. Isn't that better than not letting U learn to ride a bike?