When we were all small children, our teachers tried to deceive us into thinking that gravity was just like when you put a bowling ball on a mattress. If you doubt that this pedagogical disaster is mainstream, then take a look here, here, here, and here. The explanation goes something like this:
“Teacher, why do heavy objects emit more suction power than lighter ones?”
“Well, you know how when you put a bowling ball on a mattress, things will roll towards it?”
“Well it’s just like that! The bowling ball is a heavy object, the things rolling toward it are lighter objects, and the mattress is the fabric of space!”
Can you believe that? That’s called bullshit. The only reason why the things roll toward the bowling ball in the first place is because of gravity, which is the very thing we are trying to understand! All science teachers who have ever used that illustration should be subject to intellectual denazification.